I have 3 exchange servers and one is hosting the hub transport and the others have the databases on them. i am running a DAG and have a witness server but that server is coming to end of life and need to move the witness roles. How do i go about doing that?

I have 3 exchange servers and one is hosting the hub transport and the others have the databases on them. i am running a DAG and have a witness server but that server is coming to end of life and need to move the witness roles. How do i go about doing that?

Its pretty easy to move.  See below:

http://www.ntweekly.com/?p=1244

Hi,

Use Set-DatabaseAvailabilityGroup to set the new witness server and path.

Set-DatabaseAvailabilityGroup -WitnessServer Server1 -WitnessDirectory D:\witness

More information here: https://technet.microsoft.com/en-us/library/dd297934(v=exchg.141).aspx

Let me know if that helps.

Thanks.

So once i set the new witness server i can shutdown the server that was the original witness server.

Yes, but I would validate the cluster (quorum tests), check the cluster and application event logs etc to ensure that the witness was moved correctly and also ensure that all nodes are up before decommissioning the old witness server. 

Thanks.