On-premise Exchange 2016 to 2019 Migration and Co-existence

Andryszak, Daniel 116 Reputation points
2021-11-16T19:39:24.347+00:00

I have reviewed many posts related to Exchange 2016 to 2019 migration and co-existence.
There appears to be two methods when the mailbox migration should occur.
One is after the new server is online and certificate imported, the other after all of the post-migration tasks are completed.
What is the recommended method?
Are there issues with one over the other?

Below are the steps - does anyone have more complete, detailed document?

  1. Install Exchange 2019 on new server.
  2. Update the Service Connection Point which is the record that will direct the users to the current Exchange Server.
  3. Import the certificates into the new server.

>> Start the Migration Process

  1. Redirect all URLs to point to the new Exchange Server 2019, like Offline Address Book, ECP, and others.
  2. Change the direction of all the outside ports from the Exchange Server 2016 to the IP address of the Exchange Server 2019. From the Exchange Sever PowerShell, point the SCP record to the 2019 server.

>>> Start the Migration Process

  1. Decommission the Exchange 2016 server,
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. Billy lawrence 5 Reputation points
    2023-04-20T10:21:43.04+00:00

    Agree with Andy David - MVP

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