I've set up a replica DC in a remote location. It's connected to the main site through a VPN connection.
DCdiag passes on the primary DC, but I get the following error on the replica DC:
Running enterprise tests on : mydomain.co.uk Starting test: LocatorCheck Warning: DcGetDcName(GC_SERVER_REQUIRED) call failed, error 1355 A Global Catalog Server could not be located - All GC's are down. Warning: DcGetDcName(PDC_REQUIRED) call failed, error 1355 A Primary Domain Controller could not be located. The server holding the PDC role is down. ......................... mydomain.co.uk failed test LocatorCheck
Is it giving this error just because it is not the global catalogue server, or is there some connectivity issue where it does not think there is one at all, as the error seems to imply? If so, it seems odd, as all other tests were passed.
What do I do about this?