In this post I will cover the recovery installation steps for a failed/crashed DAG member server with multi role (the same steps can also be used if you wish to change the hardware). I have tried tried to include almost every possible points which can occure during the recovery of mutil role DAG member recovery on Exchange Server 2010.
Install a new server with same Name, OS and patch level.
Reset the computer account from ADUC Console(failed exchange server/ the server planned to reinstall),
Assign the same IP as like the failed server(including replication), and join to the domain
Install the pre-requisites for exchange installation.
Create Same structure of drives/mount points on the new server, this is for the database copy creations etc.
Once the server is restarted, you can add it back to the DAG membership and create the database copeis, which I have explained in the next sction.
Add the server back to DAG membership
This operation may fail if the server is still in the cluster configuration,So you may have to evict the node from Failover Cluster Manager (shown below)
Add database copy to the recovered server and let it finish the initial seeding.
You are almost all done. Also ensure that you redo all the customized settings for your infrastructure.
Share if you face any issues,