O365 to Exchange on-prem migration error

When you attempt to migrate an O365 user back to Exchange 2010 on-prem you may receive this error:   “You shouldn’t migrate mailbox ‘Paul Demmer’ to Exchange 2010 or an earlier version while the user’s Instant Messaging contact list is stored in Exchange. If you do, the user could permanently lose access to their Instant Messaging contact list, which will cause […]

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Copy members from one Distribution Group to another Distribution Group in PowerShell

As an Exchange and Active Directory administrator you may be asked at some point to make a new distribution group from one or more other distribution groups. Exchange 2010 and PowerShell make this a very easy task. So to get started log in to your exchange server and open your Exchange Management Console.     Now we need to create the […]

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Converting User mailbox to Shared or Room mailbox

Open Exchange Management Shell Enter the following command: get-mailbox -identity <username or display name> | set-mailbox -type shared Afer the process completes, the mailbox will show as a share box.     Example:                   ***To convert shared to a user mailbox enter the following command:   Enter the following command: get-mailbox -identity […]

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Unable to Migrate O365 user back to Exchange On-Prem – ERROR: Cannot find a recipient that has mailbox GUID

When you try to migrate an O365 mailbox back to Exchange on-premise, you may run into this error message.                 Below is the solution for it.     SOLUTION Set the ExchangeGUID property on the associated on-premises remote mailbox before you move the mailbox to the on-premises organization. To do this, follow these […]

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Delete specific email from O365 mailboxes

1.  Connect to Exchange On-line From the PowerShell console on an Exchange 2010 server: $Cred = Get-Credential $s = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://ps.outlook.com/powershell -Credential $cred -Authentication Basic –AllowRedirection Import-PSSession $s Type in your Domain Admin credentials with username of <username>@domain.com Type in your Domain Admin credentials with username of domain\<username>   Run this command: you will need the distribution […]

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Delete a Calendar item from a mailbox

If you have the need to remove a specific calendar event/appointment from a mailbox, you can do it through Power Shell or Exchange Management Shell. Open PowerShell or EMS If this is an O365 mailbox, you will need to connect to the O365 environment Connect to Exchange On-line From the PowerShell console on an Exchange 2010 server: $Cred = Get-Credential […]

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Creating a Remote Mailbox in an Exchange Hybrid Environment

If you operate an Exchange hybrid environment you will eventually want to create Exchange Online mailboxes for new users without creating them on-premises and migrating them. The easiest way to do this is to create the new user object and remote mailbox from the on-prem Exchange Admin Center (EAC). Logon to the on-premises Exchange Admin Center. On the Recipients > […]

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