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Curious_Kevin16's avatar
Curious_Kevin16
Brass Contributor
Mar 15, 2024

How to deal with an existing mailbox in Exchange Online (due to Teams being used) before migrating

We have a scenario where Teams being used across the organization with a cloud identity. These accounts were recently consolidated with On-premises by soft matching via Entra ID Connect Sync. 

 

The issue now is, due to Teams were used with the cloud identity before account consolidation, there's a Exchange Online Mailbox for every user. We now have to migrate on-premises mailboxes to EXO as we've deployed Exchange Hybrid. 

 

My question is, how do we deal with this existing EXO mailbox ? what is the best practice to avoid potential issues to Teams and its data associated with the existing mailbox ?

 

I really appreciate your thoughts !

 

Thank you

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