Assigning a license to a new MailUser stuck on: 'We are preparing a mailbox for the user.'

Question

I am trying to do a tenant to tenant M365 migration. The Applications and Migration end points have been setup. I have created the mail-user account in the target (AAD connect not syncing yet) with the ExternalEmailAddress, the ExchangeGUID and ArchiveGUID matching the source user and I have populated all of the x500 addresses, including the legacyDN. That created with no errors.

After assigning the EOL License it has been stuck on 'We are preparing a mailbox for the user' for over 12 hours now.

1. In reality how long should this typically take?
2. Is there any way to determine progress? I see no errors if I do a 'get-mosluser'.
3. Is there any way to test that the migration endpoints have been setup correctly? I'm assuming it needs to communicate with the source somehow.

Thanks

Andy

Answer 1

You can try to have it re-provision.
It can take up to 24 hours. I had it a few times take that long. Usually, it's done within minutes.

Get-MsolUSer -Userprincipalname "" | select *ObjectID*  

Copy the Object ID.

Redo-MsolProvisionuser -ObjectID ""  
 

Also, you can try to fix this by Exchange admin center on-premise, DISABLED the mailbox (this removes all the Exchange attributes and reverses the user to a non-mail enabled user). Then, once the sync has done its job, recreate a mailbox for the user and force on-premise / azure sync. Then, run a New-MoveRequest and wait for it to complete.

Answer 2

@Andy C3000

I think the Enterprise Agreement is said customers who buy the Microsoft 365 subscription plans.

About the question 3, it also be pointed in that article: How do I know this worked?

Test-MigrationServerAvailability -EndPoint "[the name of your migration endpoint]" -TestMailbox "[Primary SMTP of MailUser object in target tenant]"  

---

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

---