Decomission Exchange 2010,AAD connect

fsdg 966 Reputation points


Exchange 2010 onprem. 0 mailboxes
M365 tenant.50 mailboxes
AAD connect server.50 user accounts synced to Azure AD.
No hybrid connectors.

I want to disable AD synchronization and have duplicate AD accounts.
Is this all what I need to do?
After removing sync,wait for 72h,decomission Exchange 2010 and mailboxes will work fine after that?

Thank you

Exchange Server Management
Exchange Server Management
Exchange Server: A family of Microsoft client/server messaging and collaboration software.Management: The act or process of organizing, handling, directing or controlling something.
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Microsoft Exchange Hybrid Management
Microsoft Exchange Hybrid Management
Microsoft Exchange: Microsoft messaging and collaboration software.Hybrid Management: Organizing, handling, directing or controlling hybrid deployments.
1,881 questions
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Accepted answer
  1. KyleXu-MSFT 26,206 Reputation points


    You could follow this article to uninstall the last Exchange server and stop AAD sync: Scenario one

    You could disable AAD Connector in the step 7:

    Then uninstall Exchange on-premises server in the step 8.

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