In our domain we have 28 sites and each site have its own Domain Controllers and we have one data center where we have 3 DCs.
Domain Controllers run DNS role as well and DNS replication is active directory integrated.
For all clients local DC is configured as primary DNS and DataCenter DCs configured as secondary DNS.
Problem is, most of the times, client machines are not gettings authentication from local domain controller, most of the times authentication happnes from other location domain controller or data center DCs.
I have done the below troubleshooting steps;
DNS - verified in the DHCP and ensured that local domain controller (DNS) server configured as promary DNS server and data center DCs as secondary
SRV Records- verified and looks fine
Subnets - Verifed and found its configured according to the sites in AD
I can confirm the information in SRV records and AD subnet information is accurate.
Please help me resolving the issue
Mahesh