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Outlook 2010 Sync Issues Folder is full of sync logs (“Synchronization Log:” and “Modification Resolution”) with Exchange 2010 Mailbox

09 Oct

After I moved my mailbox to Exchange 2010, I started seeing two kinds of Sync logs in “Sync Issues” folder: “Synchronization Log:”  and “Modification Resolution”.

Whenever I delete something and empty my “Deleted Items” folder, I see a sync log in a minute. It says,

22:45:33 Uploading to server ‘CAS1.company.com’
22:45:33 Synchronization of some deletions failed.
22:45:33          [0-130]

22:45:34        1 view(s)/form(s) updated in online folder
22:45:34        4 view(s)/form(s) deleted in online folder

For the record, it doesn’t happen if my Outlook is on ONLINE mode. It only happens in Outlook Cached Mode.

It drove my users crazy. It seems it drives lots of people crazy as I read in technet forums. So far no one finds solution for this. There are many explanations why it happens, but no solution. Exchange 2010 SP1 doesn’t fix this issue either. Well, I have been told it’s Outlook 2010 related issue, not an server problem.

I called Microsoft support and they confirmed they themselves are getting this logs. Sad smile If you find an solution, please reply to this blog. Or hopefully next Office 2010 service pack fix this one.

 

Whenever I did something with Calendar items (deletion or modification), I see “Modification Resolution” log in Sync Issues folder.

14:30:00 Message class: {SU:IPM.Appointment}
14:30:00 Appointment Conflict Resolution
14:30:00 Local subject: {SU:Team Lunch – Placeholder}
14:30:00 Remote subject: {SU:Team Lunch – Placeholder}
14:30:00 Local Message Entry ID: {CB:70, LPB:0x00000000D7754433D4F990489C0A23AA08ED28C307005EF0C574BA12B14F805532F0BB58596200000A794FE70000FE23979F836CCA43B84FC495B894A5110000003B56A30000


14:30:00 Not equal (conflict) named property: 0×00150003
14:30:00 Conflict Merge named property: 0×00150003
14:30:00 Critical properties merged into remote item.
14:30:00 Successfully auto-resolved

I heard BES server also generates these logs consistently.  I came to know how to stop “Modification Resolution” logs. Modification Resolution log explains what Outlook did on a conflict on items. To stop generating this log, create a registry entry as below with option 0.

Key: HKEY_CURRENT_USER\ Software\Microsoft\Office\14.0\Outlook\Options
DWORD: EnableConflictLogging
Values:

0 = Never save Modification Resolution logs
1 = Always save Modification Resolution logs
2 = Save Modification Resolution logs when a "critical conflict" occurs
<This is the new Default behavior when the EnableConflictLogging dword does not exist.>

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124 Comments

Posted by on October 9, 2010 in Exchange Server

 

124 responses to “Outlook 2010 Sync Issues Folder is full of sync logs (“Synchronization Log:” and “Modification Resolution”) with Exchange 2010 Mailbox

  1. Renee

    November 30, 1999 at 12:00 am

    SP1 does not fix the problem

     
  2. hartridge noc

    November 30, 1999 at 12:00 am

    Similar situation here too. Odd thing though is that the Windows 7 laptops running with cached mode don’t seem to be experiencing this issue at all, but all the XP SP3 laptops are. Anyone else want to comment on what OS they are (or aren’t) seeing this issue with? Laptops with the problem are also showing Event ID 9646 on the Exchange 2010 server as well.

     
    • Casey

      October 25, 2011 at 3:57 pm

      I”m getting it on & prof 64 bit

       
      • Casey

        October 25, 2011 at 3:58 pm

        Oops – that’s 7 Professional…

         
    • Joe

      February 27, 2012 at 10:14 pm

      I am seeing these messages and I’m running Windows 7 32 bit.

       
  3. Kuda

    November 30, 1999 at 12:00 am

    Many users are getting this sync logs everytime they send mail. Its accualy driving everyone crazy. Any solution to this?

    thanks

     
    • Anand

      March 12, 2011 at 5:45 am

      Kuda,
      So far no solution from Microsoft. I am waiting for Office 2010 service pack. Since Microsoft knows this issue (they themselves suffer from it), I am hoping they will fix it on next service pack.

      Other way is to write a VBA script to clear the SyncFolder contents and distribute it via GPO. I don’t have time to spend to try out solutions.

      Good Luck.

      Anand

       
      • mike

        April 4, 2011 at 5:37 pm

        i found that blowing away my local OST file and letting Outlook rebuild it from our Exchange server this problem for me.

         
      • anandthearchitect

        April 4, 2011 at 5:39 pm

        That actually doesn’t fix it, I tried that. After a while you will see the sync issues folder filling up again.

         
  4. Steve Dutcher

    November 30, 1999 at 12:00 am

    Any updates on this issue? I have a client using hosted webmail that is getting this error as well.

     
  5. Mark Rogalski

    November 23, 2010 at 10:17 pm

    Thanks for the blog. You saved me from hours of wasted troubleshooting. Wish I’d have known the same thing about searching our network drives with Win 7/Server 2008 R2 “search” LOL

     
    • anandthearchitect

      November 24, 2010 at 1:08 am

      I am glad it saved your time. What I am hearing is Microsoft needs more support calls to make a case for developers to make a hot fix.

       
  6. Ed

    November 30, 2010 at 6:42 pm

    Getting the same thing here when deleting email/contacts/calendar items. Also I noticed that I cannot download the Offline Address Book during a send/receive.

     
  7. Ted Smith

    March 21, 2011 at 8:30 pm

    Outlook 2007/2010 Sync Issues with Exchange 2007/2010.

    Sync Issues:
    Synchronization of some deletions failed.
    Also, Offline Address Book.

    I migrated our Exchange server from 2007 to 2010 SP1 on a new domain and am running both Outlook 2007 and 2010 on the desktop. When I looked at our sync issues I found that while I had a UCC (multi- SAN certificate) on the mail server with internal and external names, I forgot to setup both A and SRV records for AUTODISCOVER in both the internal and external domains. (Firewall has loopback, so I keep external domain names at the registrar only and don’t duplicate them on internal DNS. Resolves VPN / OWA issues.)
    Once I created both the A and SRV records in both internal and external domains, flushed server cache and ran ‘ipconfig /flushdns’ on the workstation… the Sync Issues automatically cleared themselves up. Verified this on another workstation. I’m letting the TTL expire on the 60 odd workstations to clear up their errors… keeping my fingers crossed!

    AUTODISCOVER (SRV) in WINDOWS DNS:
    Forward Lookup Zone | Other new Records | SRV
    Service: _autodiscover
    Protocol: _tcp
    Priority: 0
    Weight: 0
    Port Number: 443
    Host: servername.intdomain.local

    AUTODISCOVER (SRV) in GoDaddy:
    Add and SRV record.
    Service: _autodiscover
    Protocol: _tcp
    Name: extdomain.com
    Priority: 0
    Weight: 0
    Port: 443
    Target: servername.extdomain.com
    TTL: 1 hr

    Your mileage may vary. Enjoy!

     
    • anandthearchitect

      March 21, 2011 at 8:33 pm

      Wow! Really! Hope this could be it. I will check my setup here.

       
  8. Ted Smith

    March 21, 2011 at 11:16 pm

    Nope. Not the magic sauce after all. After a big delay the Sync Issues started up again.

     
  9. anandthearchitect

    March 21, 2011 at 11:33 pm

    Yes, I do have correct autodiscover SRV records. It is the client issue and not at all server side problem. Since this doesn’t happen on Outlook 2003 and Outlook 2007/2010 online modes, something wrong in Outlook 2007/2010 offline mode access algoritm or bug.

     
  10. ishTech

    May 11, 2011 at 2:05 am

    I have this problem and it is killing me. The biggest problem it causes is that some folders are not synchronized and therefore the server has for example 60 messages in folder “XYZ” but on my laptop it only has 58 messages. This is really difficult situation and I need solution fast. I can’t possibly work with ONLINE mode instead of cache mode because it takes forever to load bigger folders. MICROSOFT PLEASE HELP!

     
  11. anandthearchitect

    May 16, 2011 at 8:36 pm

    GOOD news. Microsoft is releasing Office 2010 SP1 in June 2011. http://blogs.office.com/b/office_blog/archive/2011/05/16/office-and-sharepoint-2010-sp1-coming-end-of-june.aspx

    I am hoping this issue will be resolved with upcoming SP1.

     
  12. THog

    July 15, 2011 at 3:26 pm

    I have applied Office 2010 SP1 in my Exchange 2010 SP1 RU4 environment, and it has not stopped these rogue Synchronization Log entries.

     
  13. brian

    July 29, 2011 at 5:16 pm

    i was able to resolve this by adding both of my mail servers to DNS forward lookup zones (internal dns only) as MX records. Then deleted my outlook profile completely and recreated it. no more sync issues, at least not yet. Exchange 2010 ver 14.1 build 218.15, outlook 2010 ver 14.0.4760.1000 32bit on Win7 32bit.

     
    • anandthearchitect

      July 29, 2011 at 5:34 pm

      Interesting!! Please update us after few days. I would like know if it is really resolved or not. :-)

       
    • Ionut Nica

      September 12, 2011 at 7:15 am

      Hi,

      Any news on this topic? Would really be interesting to see if this was the correct fix.

      Thanks,
      Ionut

       
  14. brian

    July 29, 2011 at 5:17 pm

    not sure which fixed it or if it was a combination of both

     
    • jeff

      January 4, 2012 at 3:41 pm

      Can you confirm you fixed the problem?

       
  15. Diego Galeano

    August 5, 2011 at 12:40 pm

    I had found this registry solution a while ago on another site. I created the registry key and the problem stop for a month or so. Now, I’m getting the Modification Resolution logs again even if the key EnableConflictLogging is set to 0. Reading this comments I see that I’m not the only one. :-(

     
  16. Ken

    October 27, 2011 at 7:09 pm

    Out of an office of 20 I’m only experiencing this issue with one computer. I’ll try the DNS suggestion above, other than that has anyone else found a good fix.

     
  17. anandthearchitect

    October 27, 2011 at 9:16 pm

    I am on Exchange 2010 SP1 RU4 ver 2. This problem is still there.

     
  18. Stephen

    November 4, 2011 at 11:00 pm

    I just installed office Pro plus 32 on my Windows 7x 64 OS Home PC. Having same Sync Issues. Need Help!! Spent $1,200.00 to upgrade hardware. This sucks at best

     
  19. sillicondale

    November 4, 2011 at 11:57 pm

    Maybe the following link has a clue – http://microsoft.allfaq.org/forums/p/125032/250302.aspx

     
  20. Brian

    January 3, 2012 at 9:55 pm

    Has anyone found a solution to this issue?
    It is making a large number of our users very unhappy!

     
  21. Nick

    January 4, 2012 at 11:09 pm

    I had this error occurring for a user who disabled the “Save copies of messages in the Sent Items folder” setting in file > options > Mail > Save messages. Once I enabled the setting the sync errors were no longer an issue.

    Server: Exchange 2010
    Workstation: Outlook 2010

     
    • Casey

      January 5, 2012 at 2:05 pm

      I have the “Save copies of messages in the sent items folder” enabled and still get this message.

       
      • Nick

        January 6, 2012 at 3:04 pm

        Take a look at any rules setup on the outlook client. I would try disabling all rules and see if the sync errors continue. I found that disabling “Cached Exchange Mode” stopped the sync errors which allowed me to focus on the client and not the server for a resolution to my issue.

         
  22. Cristiano

    January 13, 2012 at 11:28 am

    Guys, looks like I solved it!!! :-)

    In my case, I had a second account opened in my Outlook 2010 which I wasn’t able to synchronize at all using Cached Exchange Mode. It worked ok in full “online mode”, but no way to let it sync using Cached Mode.

    Today I discovered an (sort of) hidden option inside the “Send/Receive” ribbon, under “Send/Receive Groups” –> “Define Send/Receive Groups”. A popup window will open, where you’ll have an “All Accounts” Group: select it and click on the “Edit…” button on the right side. This will open a further popup: here you’ll want to be sure that for each and every account, you have selected (ticked) the option “Include the selected account in this group”, which is on top of the window, and select also “Send mail items” and “Receive mail items”, slightly below.

    As far as I can see, now my mailbox is synchronizing again like charm!

    Hopefully this will help anybody who already tried to rebuild the “ost” file like I did several times, without solving the issue.

     
    • Casey

      January 13, 2012 at 8:24 pm

      Sorry Cristiano -I tried this and it didn’t work for me. My IT department is baffled!

       
      • Justin L.

        January 16, 2012 at 4:58 pm

        same here. I tried 450 sync log [0-130] issues since Friday 1/13.

        We have Exch. 2010 in a VM and OL 2010 32bit on Win7 Ent. 32bit. Company wide issue.

         
  23. Juliet

    January 13, 2012 at 7:57 pm

    Christiano – Since you just tried you solution, can you please let us know in a week if it is still working?

    I have a few users who this is driving kinda batty …

     
  24. Ryan

    January 16, 2012 at 2:16 pm

    Hi

    I am also getting sync errors on Outlook 2010 and Exchange 2010 but only for users in one site. Below please find part of sync log

    15:26:47 Downloading from server ‘XX123.xx.xxx.com’
    15:26:48 Synchronizing Forms
    15:26:48 Downloading from server ‘XX123.xx.xxx.com’
    15:26:48 Error synchronizing folder
    15:26:48 [80004005-501-4B9-560]
    15:26:48 The client operation failed.
    15:26:48 Microsoft Exchange Information Store
    15:26:48 For more information on this failure, click the URL below:
    15:26:48 http://www.microsoft.com/support/prodredirect/outlook2000_us.asp?err=80004005-501-4b9-560
    15:26:48 Done
    15:26:53 Microsoft Exchange offline address book
    15:26:53 0X80190197

    15:09:10 Synchronizer Version 14.0.4760
    15:09:10 Synchronizing Mailbox ‘Smith, John (XX – New York)’
    15:09:10 Synchronizing Hierarchy
    15:09:36 Error Synchronizing Hierarchy for Mailbox ‘Helpdesk New York, (XX – New York)’
    15:09:36 [80004005-501-4B9-1900]
    15:09:36 The client operation failed.
    15:09:36 Microsoft Exchange Information Store
    15:09:36 For more information on this failure, click the URL below:
    15:09:36 http://www.microsoft.com/support/prodredirect/outlook2000_us.asp?err=80004005-501-4b9-1900

    Any ideas?

    Thanks in advance

     
  25. Geo

    January 30, 2012 at 9:27 am

    Cristiano
    I also have this problem.
    Get you a new synchronization errors?

     
    • Cristiano

      February 1, 2012 at 5:22 pm

      Yep, I can confirm that the process I described in my post was successfull in my case. But I can understand that most of you are maybe in a different situation than I originally was.

       
  26. Eric

    February 1, 2012 at 2:35 pm

    We’re getting this problem too…. MICROSOFT, fix your stuff! Anyone have any other ideas on this? Doesn’t seem to be any real solution other than disabling cache mode..and for our users at remote sites, this is not really an option. help?

     
    • Casey Stauber

      February 1, 2012 at 3:33 pm

      Not to mention that disabling cache mode did not work for me!

       
      • anandthearchitect

        February 1, 2012 at 6:44 pm

        This is the first time I am hearing Outlook Online mode is not resolving the issue. Sync error happens because it compares and update the changes to the Outlook cache. Outlook online mode is what you looking at the changes in real time, thus no possibility of this error. Can you double check your settings?

         
  27. Casey Stauber

    February 1, 2012 at 7:20 pm

    You are right – when I went back and checked my settings the cache mode was enabled. I have disabled it and will let you know results.

    Thanks!

     
  28. Geo

    February 2, 2012 at 8:09 am

    for my clients who have this problem, every time there is in the loop, using a mobile as blackberry, ipad, ect ..

    You too?

     
    • Casey Stauber

      February 2, 2012 at 2:38 pm

      I don’t use it on mobile devices very often. Only when I’m traveling and don’t have access to a computer (which is rarely). I have not noticed that though the few times I have access my mail through my phone.

      By the way, so far so good no error messages since I disabled the cache mode.

      Thanks!!

       
  29. dan haller

    February 10, 2012 at 10:20 pm

    This resolved my sync issues. Log out of Outlook. Rename your offline data file from outlook.ost to outlook.ost.old found here C:\documents and settings\LoginID\Application Data\Microsoft\Outlook. When you log back onto Outlook, it will recreate this file.

     
    • anandthearchitect

      February 10, 2012 at 10:24 pm

      Nope, that will not resolve the issue. Wait for sometime, those SyncIssues posts will show up soon. Try accessing emails on your phone (delete an email if you can), Outlook will log SyncIssues post right away.

       
    • anandthearchitect

      February 15, 2012 at 8:01 pm

      ShreeRam_iyer: That link is NOT at all related to this issue. You must be meaning different Outlook issue.

       
  30. richardwarrinerRichard Warriner

    February 21, 2012 at 7:31 pm

    http://support.microsoft.com/kb/2606009 is the correct article but no solution

     
    • anandthearchitect

      February 21, 2012 at 8:30 pm

      Yes, that KB article says,
      “Microsoft is researching this problem and will post more information in this article when the information becomes available”.

      Hopefully they update the same KB article when they resolve it.

       
  31. liver-bird

    February 24, 2012 at 10:52 am

     
  32. Ezra

    March 13, 2012 at 2:05 pm

    This problem is driving our whole office crazy. Anyone have a real solution to make the offline folders match up to the server?

     
  33. VL

    March 26, 2012 at 1:27 pm

    delete the profile, and recreate it, this is the only option I’ve found!

     
    • anandthearchitect

      March 26, 2012 at 3:53 pm

      That actually doesn’t work. Over time it will start building the sync error logs. Just wait and see.

       
  34. Deb Dorn

    March 26, 2012 at 8:01 pm

    Having this with a user’s mailbox, large mailbox and has a secondary added through Advanced Settings, another that shows up on it’s own after giving him full rights for this third mailbox. He moves messages back and forth. I have removed Download Shared folders, but left it on Cached. Once you take it off, it seems to take it off for his main mailbox. I’ve archived much of the mail in both. Changed and recreated OST files as well. Lots of sync issues, and only when in cached mode. Windows 7, Exchange 2010 SP1, Outlook 2010.

     
  35. VL

    March 28, 2012 at 12:44 pm

    this is really annoying the whole company! ! ! ! anyone have the solutions? please.!!!!!!!!

     
  36. doug s

    March 28, 2012 at 8:39 pm

    what kind of A/V software are you all running?
    Is it scanning the OST file for changes? Or email traffic (inbound/outbound)

    Disable it and see if you still have issues.

     
    • anandthearchitect

      March 28, 2012 at 9:04 pm

      Ha..ha..Old school advise. That already been tried and not the issue. If you “read” the blog carefully, Microsoft support said they themselves are having same issue.

       
    • anandthearchitect

      March 29, 2012 at 7:05 pm

      True, but it happens to who don’t have BES server in the enterprise. So you may resolve the duplicate sync errors, but you will receive sync errors just for the account of Exchange bug.

       
  37. Greg Bauman

    April 6, 2012 at 8:58 pm

    Hi all

    I’m having similar issues. I’m an external remote consultant for a company who is running Office 365. I have WinXP latest SP, plus Outlook 2010 on a desktop. I have nearly 6,000 sync error messages in that folder, along with one item in the Conflicts folder. But, that item just got added on Mar6, and my sync errors go back to Jan3, the date I started my consultation.

    I already had enabled the “Save copies of messages in the Sent Items folder” setting, so that didn’t fix it.

    I can’t find where to select Online vs Online Cached Mode on the client side. Where do I do that?

    Here’s a calendar problem I think is directly related. Monday (Apr2) my entire Outlook calendar (the one under the consulting account) went 100% blank. Not only that, but a 2nd calendar (again specifically for the consulting account) appeared – also 100% blank. These are both in addition to the Local Calendar I have. I use many IMAP accounts in Outlook. First I saw of this problem was Sunday night, perhaps early AM Monday morning, when I checked what my calendar looked like for Monday. It was literally *blank* which never happens.

    I think the massive number of syncs (and whatever is causing those log entries to appear) has now borked my calendar, too.

    Couple more details that might be pertinent…
    I use my iPhone attached to the Exchange account (consulting one)
    I use SalesForce for Outlook, which also sync’s to the same account. SF only sync’s emails – I disabled tasks and events (calendar stuff) a while back.

    Any help would be appreciated!

    Greg

     
  38. Greg Bauman

    April 6, 2012 at 9:10 pm

    One other thing. I can confirm for my situation, disabling all local client Rules did nothing. I disabled those at 2:30pm today, and had a sync error appear at 3:46pm. I will keep an eye on it, but I don’t think that changed anything.

     
  39. Trish

    April 23, 2012 at 8:48 pm

    I’m looking for resolution on this as well…. Anything yet?

     
  40. Janne

    April 25, 2012 at 6:33 am

    I had a lots of sync errors in outlook 2010 with office 365 and shared calendars. I fixed th problem by doing following:
    1. uncheck the outlook “Cached Exchange Mode” from email account settings
    2. delete all shared calendars
    3. restart outlook
    4. go to account settings and check the option “Cached Exchange Mode” again (also check the option “download shared folders”
    5. restart outlook
    6. go to calendars and open shared calendars again

    I don’t know if those restarts are needed, but this got it working at least for me. Now I’m going to test this with another computers and office 365 accounts. Hope this will fix the problem :)

     
    • Mike

      May 29, 2012 at 5:05 pm

      Is the problem still gone or did it come back?

       
  41. Richard

    May 29, 2012 at 4:20 pm

    Hey Guys

    Any luck with this? what is the outcome. This is driving me crazy. Appreciate any help on this

     
  42. Bob

    June 13, 2012 at 3:51 pm

    I have reproduced the issue: Turn cache mode on. Send an email and then drag that email out of the sent items folder into a PST file before sync’ing the sent items folder in the mailbox. Sync the sent items folder in the mailbox and the sync issue occurs. Conclusion: Sync issues occur when cached mode is turned on and an email is moved out of the mailbox before the mailbox is sync’d with the server.

     
  43. rk

    June 19, 2012 at 8:10 pm

    I have one user with this problem as well. I’m just posting here to get email updates.

     
  44. mthebColin

    June 27, 2012 at 2:19 pm

    I too am havig this problem. I am close to reverting to Google Apps. but will wait a while in the hope MS issues a fix.

     
  45. Ernesto

    June 27, 2012 at 2:35 pm

    I’ve got this problem as well, any solutions?

     
  46. Mahendra kanade

    July 7, 2012 at 2:35 pm

    “ALL WORD”

     
  47. Mahendra kanade

    July 7, 2012 at 2:38 pm

    “ALL WORD”
    ‘BEST FOR YOU’
    THANKS.

     
  48. ost to pst

    July 19, 2012 at 10:54 pm

    Howdy I am so delighted I found your blog page, I really found you by accident,
    while I was browsing on Yahoo for something else, Anyhow I am here now
    and would just like to say thanks for a fantastic post and a all round exciting blog (I also love the theme/design), I
    don’t have time to look over it all at the moment but I have book-marked it and also included your RSS feeds, so when I have time I will be back to read more, Please do keep up the superb work.

     
  49. Basar Guven

    July 23, 2012 at 11:31 am

    Hi

    After ripping my hair for months Sync Logs kept coming no matter what. Doing everything and else listed all around the web and here . I finally concluded that this problem is not related to the client and/or outlook but the Exchange DB somehow.

    Switched to online mode, closed outlook, deleted OST.

    RDPed to the server, moved the mail box to another mailboxdatabase with 50 corrupt item skips.
    Moved it back again.

    Launched outlook, switched to cached mode again.

    11 th day with no issues…

    Ps: iPhone with push is enabled on the mailbox.

     
  50. ost to pst

    July 23, 2012 at 7:04 pm

    Very nice article, totally what I needed.

     
    • Bob Delaney

      July 26, 2012 at 2:45 pm

      Found this link.

      http://technet.microsoft.com/en-us/library/hh881571.aspx

      You can work around this issue by stopping the Modification Resolution logs, which provide a description of the actions that Outlook took during a conflict situation. To stop the Modification Resolution logs, configure a registry key as described in the following table, and set the value to 0:

      Key
      HKEY_CURRENT_USER\ Software\Microsoft\Office\14.0\Outlook\Options
      DWORD
      EnableConflictLogging
      Values
      0 = Never save Modification Resolution logs
      1 = Always save Modification Resolution logs
      2 = Save Modification Resolution logs when a “critical conflict” occurs
      Items appear to be expired in Outlook but are not removed by Exchange Server

       
      • Bob McCoy

        May 8, 2013 at 7:37 pm

        Verified on Outlook 2013 (15.0) with Exchange in the cloud.
        Thank you, thank you, thank you!

         
  51. Ian Burrowes

    August 6, 2012 at 6:02 am

    There is also a group policy setting that achieves the same thing:

    User Config/Policies/Administrative Templates/Microsoft Outlook 2010/Outlook Options/Other/Advanced

    Prevent saving sync conflicts – [Enabled]

     
  52. Mike

    August 22, 2012 at 3:29 pm

    I have a work around.
    uncheck empty deleted items folder when exiting outlook (options,advanced
    setup autoarchive on the deleted items folder to permenantly delete contents every day or one a week .

    the sync issue seems to happen because outlook goes offline before emptying the deleted items folder

     
  53. Mike

    August 22, 2012 at 3:31 pm

    oops .. that should read, once a week

     
  54. Peter

    August 29, 2012 at 7:57 pm

    I don’t have that option enabled in Empty Deleted Items and am still having the problem.

     
  55. ivan

    September 5, 2012 at 1:16 pm

    running this fixit fixed my sync problems

    http://support.microsoft.com/kb/831124

    Ivan

     
    • Sam

      September 21, 2012 at 2:49 pm

      Ivan, its been a couple of weeks, can I get some verification that the fix is continuing to work for you?
      Thanks
      -Sam

       
    • Tina

      September 24, 2012 at 5:19 pm

      Thank you Ivan!! I have been searching for this everywhere!

      1.Click Start, click Run, type regedit, and then click OK.
      2.Locate and then click the following subkey in the registry(Or CREATE Key “Cached Mode”):
      HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Cached Mode

      3.On the Edit menu, point to New, and then click DWORD Value.
      4.Type “ANR Include Online GAL”, and then press ENTER.
      5.On the Edit menu, click Modify.
      6.Type 1, and then click OK.

      (Modified a bit from site Ivan Suggested: http://support.microsoft.com/kb/831124)
      Good luck all!
      ~Tina

       
    • Jesse

      November 20, 2012 at 9:23 pm

      I would really like to know if this helped, as it does not seem related to the issue.

       
      • Tina

        January 23, 2013 at 2:03 pm

        Jesse – Sorry this is late, I didn’t get an email until today that there were new posts. Sadly no, I still have the issue with all of my users. Still looking for the answer to my problem. :(

        ~Tina

         
  56. Paul

    January 18, 2013 at 1:37 am

    We have several clients at one company having the same issue, the work around is a follows:
    Set outlook to online mode, perform archive of the mailbox to reduce the size and number of emails. Delete the current OST file, then set cache mode back on and the sync issues should be resolved, if it does not archive more.

     
  57. Tuan

    January 22, 2013 at 9:31 pm

    I’ve read through each and every posts on this page and have tried out the work-around solutions, but still no luck. Has anyone found the solution yet? Thanks!

     
    • Basar Guven

      January 23, 2013 at 4:41 am

      After chasing my tail for weeks, I deleted the mailbox waited for a few days then recreated. Never had the problem again… Its months now.

       
      • ivan

        January 23, 2013 at 2:32 pm

        Hi Basar,

        what do you mean by ‘deleted the mailbox’? Thanks, Ivan.

         
      • Peter Andersen

        January 23, 2013 at 3:48 pm

        To delete all the mailboxes and then recreate them. Wow if we only had a few mail clients that would be ok but that is a pile of work for a little problem. I am going to make a rule to just delete those emails when they come in.

         
    • Tuan

      January 24, 2013 at 3:59 pm

      I combined few works around from various site (including the ones from this site) and it works well for me. So, i would like to share it with everyone. Hopefully it will resolve your annoying issue with the “Synchronization Log:” email.

      Here are the instructions to turn it off:

      1. Click on File -> Options
      2. On the pop-up window, select Advanced on the left panel
      3. On the right panel, scroll down, and click on the Send/Receive button
      4. On the pop-up window, click on the Edit… button, which will open up another pop-up window
      5. Check Include the selected account in this group checkbox and then check the Send and Receive items checkboxes
      6. Click on the OK button to save and close out all other pop-up windows.

      Steps 1-6 above would solve this issue for most people. If you still getting the “Synchronization Log” email after completing those steps, please continue with the steps below:

      7. Click on “Unread Mail” folder on the left column of your Outlook
      8. Click on the “View” tab on top of the screen
      9. Click on “View Settings” button
      10. Click on “Filter…” button
      11. On the pop-up window, click on the “Advanced” tab
      12. For the “Field” dropdown, select “Frequently-used fields” and then select “Subject”
      13. For the “Condition” dropdown, select “doesn’t contain”
      14. Enter “Synchronization Log:” in the “Value” field and click “Add to List” button
      15. Click “OK” button few times to close it out

      Completing steps #7 to #15 above will customize the view for the “Unread Mail” folder not to show the “Synchronization Log:” emails.

      ….and if that still did not solve your issue, here are the last trick:

      16. Hold down the “Windows” key on your key board and press “r” to invoke the “Run” program
      17. Type in regedit and click on the “OK” button to open up the “Registry Editor” window (Windows will ask for your permission, just click on “Yes”)
      18. Expand the following keys:
      HKEY_CURRENT_USER > Software > Microsoft > Office > 14.0 > Outlook

      19. Select the “Options” folder on the left
      20. On the right panel, double click on the “Default” and enter 0 and save
      21. Close out “Registry Editor”

      The steps above will tell Outlook not to bother reporting the “Synchronization Log:” email because you won’t care about it.

      It has been few days now and I haven’t received any “Synchronization Log:” emails.

       
      • MZimbaro

        March 13, 2013 at 3:02 pm

        I had to do all 21 steps but so far this solution is working for me. I am using Outlook 2013 but I had the problem all through Outlook 2010 with Exchange 2010. Nice to maybe finally close this one for me. (Knock on Wood).

         
  58. pst

    March 7, 2013 at 2:10 pm

    we are having the same issue but not on exchange 2003, our users are running either outlook 2010 and 2007, the server data size shows a lot of sync failures and conflicts which is filling up their mailboxes. any help will be appreciated.

     
    • pst

      March 7, 2013 at 2:10 pm

      correction – but on exchange 2003…..

       
  59. czgurl

    March 8, 2013 at 9:47 pm

    I found a weird work around. This has been driving me crazy for a while.
    -On the “Unread Mail” folder right click.
    - Select “Customize This Search Folder”
    -Click Browse.
    -De-select “Search Sub folders”.

    This solved the problem for me so far…of course the stuff that is unread is not showing up in the “Unread Mail” folder anymore either…but if you do have unread items you will see them show up next to the folder they are in. EX. if you have an unread email in your Inbox if you look at your Inbox folder it will show: Inbox [1] for when you have an unread item in it.

     
  60. SDunfee

    March 11, 2013 at 7:53 pm

    I have a single computer at a client having the same issue. Exchange Server 2010 (14.02.0328.009) running on Server 2008 R2. The client is running Windows XP SP3, Outlook 2010 SP1. Waiting for a fix from Microsoft…..

     
  61. SDunfee

    March 11, 2013 at 7:55 pm

    Posting here to recieve e-mail additons. (forgot to check the box on the first post)

     
  62. Goshun

    March 12, 2013 at 6:37 pm

    After checking out what “czgurl” suggested I played around with those options, and came up with these settings inorder to get all your unread messages in the Unread Mail folder:
    -On the “Unread Mail” folder right click.
    – Select “Customize This Search Folder”
    -Click Browse.
    -If necessary, click the arrow next to the email account to get all the subfolders under it
    -De-select the email account
    -Select all the other options that you want
    -OK your way out

    Some of my users have around 100 subfolders, so being able to use the Unread Mail folder is a must. I haven’t tested it for long, but if you are going to try CZGURL’s suggestion then I suggest you use this in case any of your users are like mine.

     
    • JGSpiers

      March 19, 2013 at 11:30 am

      Hi

      Amazing that this thread has been going since 2010, did the exchange service packs and updates never solve the issue of Sync folders filing up?

       
      • Zee

        March 25, 2013 at 7:47 am

        Nope…..im still having the same problem!

        Also noted that their appears to be a sync issue with “Views” as well

         
    • Felicia

      April 4, 2013 at 2:51 pm

      I turned off Office 2010 Upload Center Sync and none of my users are getting sync errors or logs anymore.

       
      • Tina

        April 4, 2013 at 4:39 pm

        Hey Felicia,
        Can you tell me exactly how you turned it “off”? I went into Settings and unchecked all the check marks, deleted my cached files, and still get the errors in my Outlook. Did you do it in the server? If so where did you go to do it at? Thanks!!

         
      • Hass

        April 11, 2013 at 10:59 pm

        Like Tina… Would you mind sharing exactly how you disabled these messages? We’re using offie365 and have the same error logs

         
  63. Kathy R

    April 18, 2013 at 8:30 pm

    This may solve problems for those opening additional mailboxes with lots of folders. It seems to have solved the syncing problem but not the Modification resolution issues that I see. However that is just one or two compared to the 4000 I was seeing.
    http://support.microsoft.com/kb/2297543

     
    • Auden L. Grumet, Esq.

      November 11, 2013 at 2:49 am

      Yes, all of these solutions merely provide a way of “hiding” the error LOGS. But what about the ERRORS?? Why are they being created and what can be done to solve the PROBLEM?

       
  64. Terry Cole

    May 2, 2013 at 3:44 pm

    Following Tuan’s advice from January 24th above, I applied those steps to a client with this issue (Outlook 2010 and Exch2010) on a peer-peer network. One of the steps included hiding items from view based on the subject line. It appears that using the “Advanced” tab functionality will not allow an “OR” situation (we need to hide subjects with “Synchronization Log” and those with “Modification Resolution”). I used the SQL tab instead, but guessed at the syntax as I found no concise, exact reference for it.

    Here’s the syntax to add to the SQL tab to get those two email subjects hidden from view:

    NOT (“urn:schemas:httpmail:subject” LIKE ‘%Synchronization Log:%’) AND NOT (“urn:schemas:httpmail:subject” LIKE ‘%Modification Resolution%’)

    Note that it did NOT prevent the counting of unread items in the folder as indicated by the integer in parentheses to the right of the folder name.

    The immediate effect of the remainder of Tuan’s advice seems to have worked so far, but I just applied it (and hadn’t restarted the pc yet). Test emalis sent immediately after applying all of Tuan’s steps did not result in the typical Sync Log issue.

     
  65. Thomas

    May 3, 2013 at 12:43 pm

    Just to Follow up this issue

     
  66. Trevor

    July 15, 2013 at 8:45 pm

    Go into your account settings and turn off Caching. Restart outlook and it will be better. If outlook is too slow for you after that just turn it back on, restart Outlook and hope that you don’t get the same errors.

     
  67. Phyllis Cole

    July 16, 2013 at 3:27 pm

    I found this information for opening the Sync Center. I’m not a tech so I don’t know how much it will help.

    Open Sync Center

    Sync Center displays your sync results if you’ve set up your computer to sync files with a network server. This allows you to access files stored in a network folder, even when that folder is unavailable by making it available offline.

    Click to open Sync Center.

    Note
    Sync Center can’t be used to sync devices with your computer. For information about that, see Sync music, pictures, contacts, and calendars with a mobile device.

    Tip
    Here’s another way to open Sync Center: Click the Start button . In the search box, type Sync Center, and then, in the list of results, click Sync Center.

     
  68. Edwin

    August 7, 2013 at 8:32 am

    Hit here, we tried the reg-key solution to suppres the modification resolution mails, and it worked..
    For about 6 months, and since 2 day’s the mails are coming back again, I checked the registry, the key is still there and set to ’0′. Anyone an idea?

     
  69. ConH

    October 7, 2013 at 7:42 am

    I think it is outrageous that this trhead is still active after all these years…We have different customers in on-line and on-premis environments all suffering the same problems. end-users are afraid they are missing out on messages, and will sooner or later all call for support. Where can I send the bill?

     
  70. Kris Cook

    October 14, 2013 at 9:08 pm

    We are having the same problem, but not with all users. I get one sync log a day, when I log in in the morning. Another user is having two or more a minute show up. I renamed her ost file last week and let Outlook build her another one. I think a couple of other people in the office are having the same problem. If it was an Exchange problem, I feel like it would happen to all of us. Does no one know YET what causes this, and what fixes it?

     
  71. GaryK

    October 24, 2013 at 9:30 pm

    Check add ins. In my case as soon as I turned off Business Contact Manager (which the user wasn’t using), the sync folder cleared all of the sync issues and I haven’t seen them again.

     
  72. Jer-Cedar

    December 6, 2013 at 6:41 pm

    In our situation, I’ve tried many of the suggestions above (and numerous ideas from other forums), but it appears the problem is related to Outlook Add-Ins for us. I disabled several Add-In and I suspect the Kaspersky AV and AS plug-ins are to blame. Still testing this theory, but so far so good.

     
  73. jdlinton

    December 18, 2013 at 9:42 pm

    I am having similar problems but not identical. My Outlook 2013 is constantly syncing my junk mail folder. So I am getting thousands of sync issues in my sync issues folder. Don’t know what to do.

     
  74. Zeb

    February 18, 2014 at 8:01 pm

    I have a client running Outlook 2013 on Win7 Pro 64bit with the same issue. I unchecked to “Use Cached Exchange Mode”, restarted Outlook and it the errors when away. Hopefully they STAY AWAY :)

     

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