Exchange Online/OWA: Where is the HELL is “Send event invitations in iCalendar format” option?

Do you have IMAP/POP3 users? It amazes me to see the some stubborn users refused to use Microsoft Outlook on their Mac/Windows computers. They uses the limited featured IMAP client. Hey! Whatever makes you happy, I guess.

Are they looking for the option “Send event invitations in iCalendar format” in OWA settings? This options converts meeting requests into a iCalendar file attachment.

They are expecting to find the option under

OWA Settings >>> Mail >>> Accounts >>> POP and IMAP


OWA Settings >>> Mail >>> Sync email

User-added image
I am sure this is the OLD OWA UI.

Instead they are seeing this in the new OWA UI.

p Search settings 
E Mail 
View quick settings 
Crynpose and reply 
Junk email 
Customize actions 
Sync email 
Message handling 
Automatic rephes 
Retention policies 
Sync email 
POP optiom 
Let devices and apps use POP 
O Yes 
@ No 
Server narne: 
Port 993 
Encryption rnethod: TLS 
SMTP setting 
Server name: 
Port 587 
Encryption rnethod: STARTTLS
So, Where the HELL is “Send event invitations in iCalendar Format” option?

I have learned that user cannot change this settings anymore. BUT as an Exchange Administrator, YOU can change this setting behalf of the user. Here is the PowerShell Command (connect to Exchange Online first):

# Provide the identity as email address of the user
Set-CASMailbox -Identity -ImapForceICalForCalendarRetrievalOption:$true -ImapUseProtocolDefaults:$false

Ta..da! Now that stone age IMAP user will start receiving future meeting requests in iCalendar file attachment. Say Hi! to them behalf of me.

Office 365: How to restore deleted OneDrive in PowerShell?

If an employee leaves the company, few managers wants the OneDrive content of the ex-employee. Few occasions it is business critical to take the documents from ex-employees’ OneDrive and re-share it again.

So how do you do that? I wrote the following script that does exactly that.

Before you run the script, make sure you have installed SharePoint Online module. Here is the help: Get started with the SharePoint Online Management Shell | Microsoft Docs

Note: Deleted OneDrive will be purged after 90 days. You can only restore the deleted OneDrive within 90 days of disabled date.

    Script to 
    1. Restore the deleted OneDrive
    2. Assign the Restored OneDrive to manager or another employee

    IMPORTANT:  Replace the OneDrive URL for the variable $DeletedUserOneDriveURL and 
    admin URL in Connect-SPOService's URL parameter.

    DeletedUsername : ex-employees' username or alias (Usually the name in the email address)
    NewUserEmail: Who needs to have access to the restored deleted OneDrive

     .\Restore-DeletedOneDrive -DeletedUsername JohnDoe -NewUserEmail



Function Connect-ToSharePoint
    Import-Module Microsoft.Online.SharePoint.PowerShell
    Connect-SPOService -Url 

    -*-*-*-*-*-*-* The Script Starts Here -*-*-*-*-*-*-*-*-*-*

    IMPORTANT:  Repalce the OneDrive URL for the variable $DeletedUserOneDriveURL

    Example OneDrive URL:
    In this example, "acme" is the company's Office 365 tag. The email address 
    is converted to  username_acme_come in the end of the URL. If you are in doubt, visit
    your OneDrive in Browser, Copy the URL from teh address bar and use it here.

$DeletedUserOneDriveURL = "" + $DeletedUsername + "_acme_com"

# This command will ask for user credentials
"Connecting to SharePoint Online..."

"Restoring the OneDrive: $DeletedUserOneDriveURL" 
Restore-SPODeletedSite -Identity $DeletedUserOneDriveURL

"Assigning $NewUseremail to the Deleted OneDrive"
Set-SPOUser -Site $DeletedUserOneDriveURL -LoginName $NewUserEmail -IsSiteCollectionAdmin $True

# -*-*-*- End of the Script -*-*-*-*-*-*

If you need to check if the “Deleted OneDrive” is already purged or not, check with these commands:

#Connect to SharePoint Online : Replace "acme" with your company's Office 365 tag

Connect-SPOService -Url

# List all deleted sites includes OneDrive. Note "Days Remaining" the last column shows how many days left for purging

Get-SPODeletedSite -IncludePersonalSite

# List only the specific user

Get-SPODeletedSite -IncludePersonalSite | ? {$_.url -like '*JohnDoe*'}

I am sure this script and SharePoint commands will be helpful to you. Enjoy.

New kind of fresh HELL: Problem Ejecting USB Attached SCSI (UAS) Mass Storage Device. This device is currently in use

I ran into this issue of not able to eject an USB disk. Before you ask the question, I have set the disk for “Better Performance”. So I have to eject the disk before I remove it. (FYI, I would suggest to use “Better Performance” for bigger disks like 1TB or above to get most performance).

Now back to the issue, I was trying to eject the disk I am keep getting this error: “Windows is unable to stop the device” or “This device is currently in use”.

See the source image
See the source image

I freaking closed all the programs/windows, even killed explorer.exe from Task Manager. I tried logged out and logged back in.

If you run into this issue, I have a fix for you. Thank me later.

  1. Open Disk Management console (either run diskmgmt.msc in Run dialog – Windows Key + R, OR Right click on Start Menu and choose Disk Management).
  2. Find your disk in Disk Management console. Right click on the disk and choose Eject.

If you don’t see Eject, you may see “Offline” option. Then choose Offline, then remove the disk. Next time you connect this disk, you have to go to back to Disk Management and make it Online.

Tip- Disable/Enable web cam at will by PowerShell

Here is the one-line code to enable or disable the web cam when you want. Here is how it works.

I wrote a one line code and save it as a PowerShell (.ps1) file. Created a batch file to call the PowerShell script files to enable or disable the web cam.


Open PowerShell and type (or copy/paste). This will display all of your Camera device(s).

Get-PnpDevice | ? {$PSItem.Class -eq 'Camera'} | fl FriendlyName,InstanceId
Here is the example:
E:> Get-PnpDevice | ? {$PSItem.Class -eq 'Camera'} | fl FriendlyName,InstanceId
 FriendlyName : Integrated Camera
 InstanceId   : USB\VID_04CA&PID_703C&MI_00\7&36726615&0&0000
 FriendlyName : S-YUE 8MP USB Camera
 InstanceId   : USB\VID_0BDA&PID_5075&MI_00\8&3E5D74C&0&0000

Now note down the Instance ID of the current camera (copy it to the clipboard).

Creating the PowerShell and Batch files

Disable Script

  1. PowerShell script file

Type the command below in a Notepad/Editor and replace the InstanceID you noted down above.

Disable-PnpDevice -InstanceId 'USB\VID_0BDA&PID_5075&MI_00\8&3E5D74C&0&0000' -Confirm:$false

Save the file as Disable-Camera.ps1.

2. Batch file

Type the command below in a Notepad/Editor and replace the path of your Powershell Scirpt file. Save the file as Disable-Camera.bat

PowerShell.exe -Command "C:\Temp\Disable-Camera.ps1"

Enable Script

  1. PowerShell script file

Type the command below in a Notepad/Editor and replace the InstanceID you noted down above.

Enable-PnpDevice -InstanceId 'USB\VID_0BDA&PID_5075&MI_00\8&3E5D74C&0&0000' -Confirm:$false

Save the file as Enable-Camera.ps1.

2. Batch file

Type the command below in a Notepad/Editor and replace the path of your Powershell Scirpt file. Save the file as Enable-Camera.bat

PowerShell.exe -Command "C:\Temp\Enable-Camera.ps1"

How to use it?

Here are my created files:

I made the shortcut for the Batch file on my desktop. When I needed, I right-click on the shortcut icons, select Run as Administrator.

To enable or disable the device, script has to run in elevated PowerShell. That’s why you have to run the shortcut Run as Administrator.

Better yet, I use Circle Dock to quickly launch programs. So I created two new icons for it.

How to sync any folder to OneDrive?

Do you want to sync/backup directories that out side of OneDrive sync’ed directory? For example, you have a directory at “D:\SDCard\PortableApps\PNotesPortable” and you want take a backup to OneDrive.

You have come to right place. This works for OneDrive (consumer) as well as OneDrive for Business. Here is how you do it.

Creating a junction for the directory D:\SDCard\PortableApps\PNotesPortable under OneDrive sync’ed location. That’s it.

  1. Open Command Prompt.
  2. Type this:
MKLink /J <OneDrive-Folder-Path> <Full path of the folder you want to sync>


C:\Users\Awesome>mklink /j "C:\Users\Awesome\OneDrive\Software\PNotes" "D:\SDCard\PortableApps\PNotesPortable"
Junction created for C:\Users\Awesome\OneDrive\Software\PNotes <<===>> D:\SDCard\PortableApps\PNotesPortable

Now you will see a Directory junction show up under C:\users\Awesome\OneDrive\Software. That’s all. Now OneDrive will sync this folder content to the cloud.

Nice Trick, hope you can use it yourself. Enjoy!

Exchange Online: Calendar Permissions – “Some Permissions cannot be displayed”

I needed remove few disabled users from the permission set in the Calendar. I got this error: “The security principal specified is already on the permission set”. To fix this error, I was using my other blog post:

Here is the wrinke. If you have Full Access permission to a mailbox, when you open the Calendar Properties dialog box and select Permissions in Outlook, you will see a message Some permissions cannot be displayed.


Fortunately This is documented in

The new Office software updates changed UI look ‘n feel of Sharing Calendar and managing permissions dialog box. They call it “much simpler user experience when sharing a calendar”. The side burn for this new UI update is that there are two sharing scenarios that are no longer supported.

  • Sharing a calendar if you have Full Access permission to your mailbox
  • Sharing a calendar if you have Author permission to a mailbox

Sure Microsoft. You had to make our life little harder and call it “much simpler user experience”.

The solution is:

1. Close Outlook

2. Add this Registry Key:

Registry key:


Value: 1

3. Open Outlook and try managing the Calendar permissions now.

Hope this helped you. Enjoy.

Exchange (OnPrem): How to make Emails from Internal Application servers are trusted/internal emails?

Usually Emails originated within Exchange Organization are considered “Internal” trusted emails. All other emails coming outside of Exchange organization are “External” emails and usually considered less trustworthy.

How to make the emails coming from internal application servers are trusted emails in On-Prem Exchange environment? Answer is understanding of how to setup the Exchange Receive Connector(s).

I would recommend you have separate receive connector with its own IP Address. What I mean is you assign additional IP address to the NIC on the Exchange Transport servers, specify this additional IP address in the Receive Connector to receive emails from Intranet servers and devices.

Open the Receive Connector properties window, go to Security. Enable Externally secured (for example, with IPsec) under Authentication settings, and enable Exchange Servers under Permission Groups as below.

Now for the keen people, the explanation for why we have to choose the above settings.

Externally Secured setting says the emails received to the connector are “External Authoritative” servers, so trust these emails. This is assuming the external servers are in physically controlled network and you know and trust the sources.

The ExternalAuthoritative authentication method requires the ExchangeServers permission group. This combination of authentication method and security group permits the resolution of anonymous sender email addresses for messages that are received through this connector. So this anonymous sender email address can have the domain names (e.g., and Exchange will accept these emails.

Hope you had a clear idea after reading this blog. Leave me a “Hello” below.


Move Mailbox to OnPrem: “MigrationPermanentException: Cannot find a recipient that has mailbox GUID “

You are trying to move a mailbox from Exchange Online to Exchange OnPrem, and you get this error message:

“MigrationPermanentException: Cannot find a recipient that has mailbox GUID <GUID>”

MSKB Article explains why it happens and how to solve it. It involves note down the mailbox GUID from Exchange Online and modifying the mailbox GUID in OnPrem to the Remote Malibox. That is two different PowerShell sessions (one to Exchange online and another one to Exchagne OnPrem).

If you use my script to connect both Exchange Environments on the same PowerShell Window, you can fix the GUID in single command.

So here it is:

Set-OPRemoteMailbox -Identity <MailboxName> -ExchangeGuid (Get-EOMailbox -Identity <MailboxName>).ExchangeGuid.guid

How to Connect Exchange Online & On-Premises Exchange server on a single PowerShell Window

Are you connecting to Exchange Online and On-premises Exchange server in two different PowerShell windows? Are you struggling to script to do things with two different Exchange environments?

Say No More to that struggling. Say HELLO to “PREFIX” when connecting to Exchange server in PowerShell. This blog post will show you how to connect both Exchange environments (cloud and on-prem) on same PowerShell Window and use both Exchange servers on a single script.

Before we go further: I am using Exchange Online PowerShell V2 Module that supports modern authentication (Okta, AzureAD, OneLogin, etc.,). Install it from here:

Now the little script to connect to both Exchange environments. You may download the script from >>> HERE <<<.

 * * * * Connect-ExchangeEnvironments.ps1 * * * *
 Connects Exchange Online and Exchange OnPrem with "Prefix" option.

 Prefix: EO for Exchange Online and OP for OnPrem.

 Written by: Anand, The Awesome

# ACTION REQUIRD: Enter the Admin Username, email address, and  OnPrem Exchange Server Name below
$OnPremUser = "Domain\AdminUserName"
$CloudUser = ""
$OnPremExchangeServer = ""

# Connection URI to connect to OnPrem Exchange PowerShell Web Session
$ConnectionURI = "http://$OnPremExchangeServer/PowerShell/"

# Get credentials for Exchange Online and Exchange OnPrem Admin account
$OnPremcredential = Get-Credential -UserName $OnPremUser -Message "Enter Password for Exchange On-Prem Admin"
$O365credential = Get-Credential -UserName $CloudUser -Message "Enter Password for Exchange Online Admin"

# Connect to Exchange Online V2
Connect-ExchangeOnline -UserPrincipalName $CloudUser `
                       -Prefix 'EO' `
                       -Credential $O365credential 

# Connect to Exchange OnPremises
$Session = New-PSSession -ConfigurationName Microsoft.Exchange `
                         -ConnectionUri $ConnectionURI `
                         -Authentication Kerberos `
                         -Credential $OnPremcredential
Import-PSSession $Session -Prefix OP

 * * * * End of the Script * * * *
 When you are done with Exchange Work:
 You may kill the Exchange sessions when you are done with following Command.
 Get-PSSession | Remove-PSSession

Alright, it’s time to explain how this works.
Notice the Prefix option on these both commands in the script:

Connect-ExchangeOnline -UserPrincipalName $CloudUser `
                       -Prefix ‘EO’ `
                       -Credential $O365credential 

Import-PSSession $Session -Prefix OP

I chose EO for Exchange Online and OP for On Premises for the tag. You MAY choose to have your own Tag here. Once you run this script, it will connect to Exchange Online and Exchange OnPrem on the PowerShell Window.

To use the Exchange command, you use the tag with the usual Exchange commands. See examples below:

On-Prem Exchange – Get-Mailbox:
Get-OPMailbox -Identity

Exchange Online – Get-Mailbox:
Get-EOMailbox -Identity

Hope this helps you all Exchange Admins. Enjoy.

PowerShell: List all DL Members recursively

I had a situation to list all members of distribution group (DL) or security group to validate the members. Problem was the DL had other DLs as members. I had to write a quick script to list all members recursively.

If you have the same requirement of listing all members of a DL, feel free to use my script. It create a CSV file of the member list.

Make sure you connect to you Exchange environment first in PowerShell. It works Exchange Online and On-Prem Exchange servers.

    This script lists all members of a distribution list including all 
    child groups members recursively. It create a CSV file with all
    groups of the given distribution group.

    Parameter: Distribution group Alias or Name or Email Address

    .\List-DLMembers.ps1 -DLName "NA-Sales"


Function    : Expand-Group
Parameter   : Distribution Group Name
Description : This function populates all the members of the
given distribution group to a global variable named $Global:Users 

Function Expand-Group ($GroupName)
    $members = Get-DistributionGroupMember -Identity $GroupName

    foreach($member in $members)
        $RecipientType = (Get-Recipient $member.Alias).RecipientType
        $member.Name + "`t`t`t" + $RecipientType
        if ($RecipientType -like "*DistributionGroup*")
            # Found an child group - calling myself to expand the group
            Expand-Group -GroupName $member.Alias

        # Create a PSCustomObject of the current member
        $MemberObject = [PSCustomObject] @{
            Name = "$($member.Name)" 
            Title = "$($member.Title)" 
            Department = "$($member.Department)" 
            Email = "$($member.PrimarySMTPAddress)" 
            Memberof = "$GroupName"

        # Store the member object to Users array
        $global:users += $MemberObject
    End of the Function

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                THE SCRIPT STARTS HERE

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# Create a Global Array Variable to store all DL member objects
$global:users = @()

# Call the Expand-Group function to populate the all DL members
Expand-Group -GroupName $DLname

#Store the member objects to a CSV file
$filename = ".\$DLName-Members.csv"
$global:users | ConvertTo-Csv | Out-File -FilePath $filename

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                END OF THE SCRIPT

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