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Dirsynced user not showing up as a Mail user in Office 365.

Hello,

We have an environment that has a on premise Exchange 2010 SP3 server. We have created the hybrid configuration with Office 365. Directory Synchronization is enabled.

At this point we have some on premise users that are showing "Synced with Active Directory" in the O365 portal, but do not have a mail user.

We are in the midst of performing a mailbox migrations to Office 365, and the only way to perform the move to Exchange online is for the user to have a Mail user setup in Contacts on the O365 portal.

Ive seen other forums with the option of Remove-MsolUser and removing from recycle bin then allowing another synchronization from on premise.

Ive also read that Microsoft has helped this situation by doing something to the AD Attributes which they do not go into detail about.

Could someone shed on some light to what could be done to add these users as Mail Users to Office 365 without removing them from Office 365 completely?

Thanks in advance!
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Alberto Alvarez Jr
Asked:
Alberto Alvarez Jr
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1 Solution
 
Gareth GudgerCommented:
I believe I've seen this problem before when there has been an issue with the Principle Name for the account.

For the accounts that are missing is the UPN configured differently than the ones that are working?
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Alberto Alvarez JrAuthor Commented:
Gareth,

No sir. Their UPNs are set correctly.
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Vasil Michev (MVP)Commented:
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Alberto Alvarez JrAuthor Commented:
Thanks for the input Vasil

All attributes were set correctly before hand.
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Alberto Alvarez JrAuthor Commented:
Had to perform the following.


    Get-MsolUser -UserPrincipalName firstname.lastname@upn.xx | Remove-MsolUser
    Get-MsolUser -ReturnDeletedUsers -SearchString firstname.lastname@upn.xx | select UserPrincipalName, ObjectId
    Remove-MsolUser -RemoveFromRecycleBin -ObjectId 41856197-e306-46c5-9cab-41dddbdafec7
    Modified an attribute on the user On-Premises and ran Start-OnlineCoexistenceSync
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Alberto Alvarez JrAuthor Commented:
Only solution to solving this issue.
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