Hello Experts,
Here is our current environment in our Domain -
DC1 - Windows Server 2012 (PDC, RID, Infra, Schema & Domain Name Master) &DC2 - Windows Server 2012 (ADC)DC1 & DC2 are of Subnet A.
Our task is to release the Subnet A& change to Subnet B (a different subnet)
We have created 2 more DCs -
DC3 - Windows Server 2012 (ADC) & DC4 - Windows Server 2012 (ADC) withSubnet B and added them to our Domain as DCs.
Now our Domain has 4 DCs -
DC1 (A), DC2 (A), DC3 (B), DC4 (B) (Here in brackets their subnets are indicated)
so, as per our plan, we will transfer FSMO roles to DC3 (B)& make it Primary & main DC & DNS Server. Then we will remove/demoteDC1 (A)& DC2 (A) after changing Primary & Secondary DNS IPs in all Clients of the domain.
Is it the correct way of doing this ? The main reason of asking this question is everything is working fine (replications etc) but after makingDC3 (B) a PDC, DCDIAG is showing some errors of Advertising, Netlogon & PDC Locator.
And AD Domains & Trusts is showing this error - "You cannot modify domain or trust information because a Primary Domain Controller (PDC) emulator cannot be contacted. Please verify that the PDC emulator for the current domain and the network are both online and functioning properly."
We need to eventually remove DC1 (A)& DC2 (A) from the Domain, so can we ignore these errors ? If not, what is the correct way to do this migration ? Thanks for an advice. :)