So I have a weird bug that pauses the netlogon service periodically on my primary domain controller. When this happens users cannot log in to the domain. I have a secondary DC offsite that is a Global Catalog and DNS server but it is reachable through an MPLS connection.
DC1 has all FSMO roles and is located with most client PCs in the 192.168.1.0/24 network. The offsite DC is fully reachable through its dns name and sits with a few clients in the 192.168.2.0/24 network.
Why wont DC2 take over log on responsibilities when DC1 is unavailable?