Exchange 2010 includes a feature called Datacenter Activation Coordination (DAC) mode that is designed to prevent split brain at the database level during switchback procedures that are being per...
Updated Apr 27, 2020
Version 3.0
Blog Post
Hello Tim
Thanks for the troubleshooter. I've used it to develop a process for a datacenter switchover for our team.
However, I do have a few questions regarding the switchback steps:
Assuming the primary datacenter comes back online and all the existing hardware is functional, your slide deck sugestions all Active Directory and DNS services need to be up and running. As well as witness, CAS and HUB servers.
Our CAS servers sit behind a hardware load balancer, would we have to switch services back over to the primary datacenter before activating the DAGs in the primary datacenter?
On the DAGs, if I understand your instructions correctly, the cluster services should not be running and set to disabled. If the cluster service is running, then would we have to run cluster node /forcecleanup?
Thanks in advance