Mailbox migration from Exch2013 to M365 completed, however user still using the Exch2013 mailbox

Question

Hi

We have a mailbox that we migrated from Exch2013 to M365. The status of the migration shows that it is complete, running this cmd Get-mailbox -Identity ******@domain.com | select recipientTypeDetails, RemoteRecipientType shows a status of Migrated

However the user is still using his on-prem mailbox and not his M365 mailbox. He can however access his M365 mailbox via the cloud

How do we force Outlook to use his migrated M365 mailbox?

Thank you

Answer 1

Hi, @Patr_UK

To resolve the issue of still connecting to your on-premises mailbox instead of your M365 mailbox after migration, you can try the following:

1.Update the DNS records to ensure that the records such as Autodiscover point to M365. More information can be found Outlook still connects to on-premise Exchange after migration - Server Fault

2.Create a new profile, Outlook may continue to reference old mailboxes due to settings such as caching. More information can be found Create an Outlook profile - Microsoft Support

3.Clear the Autodiscover cache and restart Outlook so that it performs Autodiscover again.

4.Make sure the user has the appropriate license. Or wait for a while after deletion and then re-add the license.

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