Removing one of the two nodes from Exchange DAG (Moving to single server from DAG)

Brass Contributor

Howdy Folks,


Exchange newbie here. Our setup consists of two Exchange Servers (EX01, EX02) as part of a DAG. We'd like to further simplify this and make it a single server as we're already on Exchange Hybrid (only 30% of the mailboxes are in 365 though). We thought of moving these remaining on-prem mailboxes to EX01 and eventually decomm the EX02 and DAG. 


In addition to moving the mailboxes across, what other areas and implications should I be worried/taken care of before we do this ? What'd be the best approach to complete this without impacting to the users ?


Appreciate your expert advises here !




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