I have a physical Domain Controller (DC) which is also a Global Catalog (GC) and DNS server and I want to decommission and format him (currently Windows Server 2008 R2).
For that reason I created a Virtual DC ,GC and DNS Server and I transferred all roles and promote him as primary DC (Windows Server 2012 R2).
I was reading that is recommended ,before decommissioning a DC Server, to shut him down for a week or two, confirm that the new DC is working with no errors and following decommission the subject server.
Unfortunately I do not have this time for waiting since the server should be formatted and revert to production as soon as possible.
For that reason I have changed all the clients to point to the IP of the Virtual DNS in order to check how they operate and I also unchecked the physical Server from operating as GC.
Is there any other recommended method prior to decommission process in order to confirm that…..:
- the physical DNS/DC is not being used anymore (does not have any records that could cause any errors once decommissioned)
- The virtual DNS/DC/GC is working in his place