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In place Exchange Application upgrade

Mohsauga 40 Reputation points
2025-03-12T12:41:18.0966667+00:00

I have exchange server running on Operating System 2016 and on exchange version 2016. With all upcoming changes coming, I need to update it to the Exchange version 2019 and then to Exchange SE when it becomes available later this year. Quick overview of my setup:

  • We are in Hybrid mode with almost everything migrated to M365.
  • We have less than 10 mailboxes that are still on prem due to mass external they sent out to external users.
  • Currently using on prem SMTP as well as uses on prem for Scan to Email
  • On-Boarding currently includes created account on On Prem and then being migrated to M365.

Question:

  • Can I do in place upgrade from Exchange 2016 to Exchange 2019 on existing OS 2016? Any issues with that? Is it supported by Microsoft?

Anything particular I need to be concern about. Any insight on this will be appreciated.

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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  1. Andy David - MVP 153.4K Reputation points MVP
    2025-03-12T13:27:50.75+00:00

    Thats not supported for an in-place upgrade.

    You'll have to get to 2019 first, then an inplace upgrade is supported

    https://techcommunity.microsoft.com/blog/exchange/upgrading-your-organization-from-current-versions-to-exchange-server-se/4241305

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