Primary exchange server down

Question

I have exchange with DAG(2 servers). And now Primary exchange server went down due to OS corrupted. We have tried 2 days make online primary server and failed.

Now we want to run services via secondary exchange. Can anyone guide step by step to run email services via secondary exchange

Exchange server 2016

Answer 1

• Before attempting to activate the secondary, ensure Active Directory replication is healthy and functioning between domain controllers.
• On the secondary Exchange server, use the Mount-Database cmdlet to mount the mailbox databases that resided on the primary server.
• Use the ActivateCopy cmdlet to activate the copy of the mailbox database on the secondary server. This process makes the database the new primary copy.
• Use the Set-MailboxServer cmdlet with the Active switch to set the secondary Exchange server as the active server in the DAG.
• If your MX record points to the primary server's hostname, update it to point to the secondary server's hostname or a load balancer managing both servers.

Answer 2

Hi,

Welcome to the Microsoft Q&A forum.

Based on your description, you can do the switchovers including

• Database switchovers
• Server switchovers
• Datacenter switchovers

Details you can refer to: Switchovers and failovers

Please feel free to contact me for any updates. And if this helps, don't forget to mark it as an answer.