Share via

Looking steps for Decommission of old DAG after Migration from 2016 DAG to 2019

IT Engineer 260 Reputation points
2024-01-12T12:58:23.31+00:00

Hello, We have two sites and single organization, one site has Exchange 2016 DAG with 4 nodes, new site has Exchange 2019 DAG with 4 node. We have migrated all mailboxes and mail flow is from 2019 DAG Servers. Now we are planning for Decommission of 2016 DAG server. Kindly need to know the best practice. Thanks.

Exchange | Exchange Server | Management
Exchange | Hybrid management
0 comments
Accepted answer
  1. Andy David - MVP 158K Reputation points MVP Volunteer Moderator
    2024-01-12T13:13:14.45+00:00
    1. Ensure all mailboxes are moved to the new servers, including the arbitration mailboxes
    2. Remove the 2016 servers as source servers in any send connector
    3. Ensure all clients are using the new servers and not the old ones. Remove the 2016 servers from any load balancing pools.
    4. Remove the 2106 servers from the DAG (https://learn.microsoft.com/en-us/powershell/module/exchange/remove-databaseavailabilitygroupserver?view=exchange-ps)
    5. Remove the DAG itself: https://learn.microsoft.com/en-us/exchange/high-availability/manage-ha/remove-dags?view=exchserver-2019
    6. Uninstall Exchange from the servers.

    If in Hybrid mode, re-run the Hybris Wizard before starting this and set to the 2019 servers only.

1 additional answer

Sort by: Most helpful
Most helpful Newest Oldest
  1. Deleted

    This answer has been deleted due to a violation of our Code of Conduct. The answer was manually reported or identified through automated detection before action was taken. Please refer to our Code of Conduct for more information.

    Comments have been turned off. Learn more

Your answer

Answers can be marked as Accepted Answers by the question author, which helps users to know the answer solved the author's problem.