It was interesting to see when I was trying to add a member to a “mail enabled” security group in Exchange Admin Center, I get this: Oh! I was freaking add a member…what the? Well, we have two options. One: Add the member using Active Directory Users and Computer console. It is easy, but we … Continue reading Exchange: Members can’t remove themselves from security groups. Please set the group to Closed… →

Here is PowerShell command to list all authorized DHCP servers from Active Directory. Replace the DOMAIN and COM with your domain name in the command below. Get-ADObject -SearchBase “cn=configuration,dc=DOMAIN,dc=COM” -Filter { ObjectClass -eq 'dhcpclass' } | Select-Object Name  | Format-Table –Wrap I used format-table with wrap option to display full DHCP server name if it … Continue reading List all authorized DHCP servers from Active Directory →

If you tried to install a unsigned driver in Windows 10, you would hit the wall. There is no settings to allow unsigned drivers like in old Microsoft Operating Systems. This is the guide to show you how to enable unsigned drivers (& risk making Windows 10 unstable). Follow the stops to enable the Unsigned … Continue reading How to install unsigned driver (if you have to) in Windows 10? →

If try anyone of the things below on accounts that is member of Domain Admins or Account Operators or any other protected groups, you know it can't be done. Changing permissions (add/remove/modify perms in security tab of the account properties window) Enabling Permission Inheritance (to activate a ActiveSync account on the Administrator's device) Low-level admins … Continue reading Active Directory: Why the protected account permissions cannot be changed? what is AdminSDHolder? →

I hope you have a text files with SPAM white and black lists. If so, it’s all down to run the PowerShell command after connecting to Exchange Online. If you created custom SPAM filter policy, replace “default” in Identity property with your custom filter policy name in the commands below. Create different text files for … Continue reading How to bulk add SPAM white and black list in Exchange Online Protection? →

Say you have a AD Security Group, you want to convert to a distribution group. (When do we stop calling Distribution List…I always said DL. Now it’s distribution group..whatever!!) It’s a very easy task. There is only one requirement. Security group must be a Universal Group. if it is not a universal group already, go … Continue reading Exchange: How to mail-enable the security group? →

By default resource mailbox process meeting requests from all users. What if you need to restrict to specific users who can book a resource? All my investigation pointed to do this: Set-CalendarProcessing  -Identity resourcename@domain.com  -AllBookInPolicy:$false Set-Calenderprocessing -Identity resourcename@domain.com -BookInPolicy "username1","username2","username3" Now I checked what AllBookInPolicy means and TechNet says "The AllBookInPolicy parameter specifies whether to automatically approve in-policy … Continue reading Exchange: How to restrict conference room only to specific users? →

You are getting this error whenever you compose a new email or replying to an email.         It means your HTML signature has a bad formatted hyper-link or "Text to display" property. To fix this issue, you may delete and recreate a new Signature or find the bad hyper-link in your signature … Continue reading Mac: Outlook throws Error when compose emails “Some of the files in this Web page aren’t in the expected location” →