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Petar P

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Sync Issue between o365 and echange 2010

Hello,

I went through a hybrid migration process of moving users from Exchange 2010 to O365. Prior to assigning everyone O365 Premium licenses I had 3 users including myself, that had Premium licenses of office 365 (mail was never synced or used), that someone had purchased in the past. I had removed those licenses and assigned users O365 Business licenses.

Account migration went without major issues, I had all the accounts synced. Today I assigned all of my users O365 Premium licenses. That is when I noticed that 4 accounts had sync issues. I got the following error "
The subscription for the migration user ******@*****.com couldn't be loaded. The following error was encountered: A subscription wasn't found for this user.." Since I was one of the users affected, I removed the migration batch I had for myself. I was simply going to re create the batch and sync again. That's when I noticed that my name was not available for migration from 2010 to O365. I did a bit of digging and found my and the 3 other accounts already having mailboxes.

Question is. How can I re-sync the 4 accounts.
Avatar of Vasil Michev (MVP)
Vasil Michev (MVP)
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Delete the mailboxes/users from O365. Export any relevant data beforehand, of course.
Avatar of Petar P
Petar P

ASKER

I can't delete the users, as they are synching with AD. Can I stop the sync delete the users then start the sync again?
If they are synced from AD, Exchange Online should not create a mailbox when assigning a license. Did you perhaps soft/hard match them against existing cloud objects?

Anyway, you can temporary disable dirsync or exclude them from the sync process in order to remove them from O365. Removing them directly via Remove-MsolUser should also be possible. Don't forget to remove them from the recycle bin in O365 too, once deleted.
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Avatar of Petar P

ASKER

Stopping the sync deleting users then re-syncing did the trick. Theroblem was caused by opening mail online before migration was complete. As I was one of affected users, after the successful Azure sync, I migrated my mailbox. Once it was migrated I tried opening my mail in O365. Immediately after that I got the sync error saying I didn't have a subscription.

Thank you all for your help.