Hybrid Exchange

Mailbox Moves without a Batch

I recently came across an issue when moving mailboxes to Exchange Online where the migration user had failed with the following error:

Error: MigrationTransientException: MAPI provider is not supported for mailbox with version ‘[version info]’ on server.

It turns out this is an issue with a recent update to Exchange Online and Microsoft is rolling out the fix. I was able to create the move request without creating a batch by running the following from Exchange Online PowerShell:

There is also a similar process if you needed to move a mailbox from Exchange Online back to On-Prem: