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Thanks for the response. This is already a cross-subnet dag. Our DR site is moving to a new datacenter. So I have two nodes in our main site and one node in the DR site which will be moving. In looking at the detailed explanation we don't currently have the exchange servers explicitly defined in our AD sites and services. The subnets are all present etc.
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Thanks for the response. This is already a cross-subnet dag. Our DR site is moving to a new datacenter. So I have two nodes in our main site and one node in the DR site which will be moving. In looking at the detailed explanation we don't currently have the exchange servers explicitly defined in our AD sites and services. The subnets are all present etc.

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Enough information to confirm answer.
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I need to move one node of our exchange 2016 dag to a new data center. I can't seem to come up with any information on the best way to handle this. Can I just add an additional subnet to the dag prior to the move? Then change IP on the server after the move. Are there any additional steps needed?
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I need to move one node of our exchange 2016 dag to a new data center. I can't seem to come up with any information on the best way to handle this. Can I just add an additional subnet to the dag prior to the move? Then change IP on the server after the move. Are there any additional steps needed?

How to migrate one node in a three node exchange 2016 dag

Database Availability Group (DAG)

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.