You may receive error messages below:

Having Office 365 mailbox spread across multiple data centres can cause issues when accessing shared resources. The issue can demonstrate it self by an inability to send as a shared mailbox or losing access to it completely in Outlook or Web-mail.

Outlook error

The specified object was not found in the store., Can’t connect to the mailbox of user Mailbox database guid: XXXX because the ExchangePrincipal object contains outdated information. The mailbox may have been moved recently. Email could not be sent. The message has been moved to your Drafts folder.

Webmail error

Your request can’t be completed at this time

Connect to your remote power-shell and run following command to view your user list and list of databases

Get-MailBox | select Displayname,Database

You will see a list below:

 

DisplayName Database
———– ——–
Owner 1 GBRP123DG081-db136
Owner 2 GBRP123DG077-db006
Discovery Search Mailbox GBRP123DG059-db037
User 1 GBRP123DG065-db120
User 2 GBRP123DG058-db105
User 3 GBRP265DG075-db123

GBRP – this shows the country location of the data centre

123 – this indicates the datacentre, if this number is different it will cause issues with shared access

To resolve this issue run a command to move the mailbox which location does not match, in our case User 3

New-MoveRequest -identity user3@domain.com

This will start the mailbox move to the correct database, to check if the mailbox is moving to the correct database run below command to view the current Move Request

Get-MoveRequest -identity user3@domain.com

DisplayName Status TargetDatabase
———– —— ————–
User 3 InProgress GBRP123DG071-db070