Thanks for your time. We have a domain where the fsmo role holder/PDC emulator (2008R2) resides in England. We have two DCs (2008R2) in the States and are both GCs. When we lose connectivity to England, workstations (XP) will get an error upon logon that no log on servers are available.. In the _MSDCS folder in DNS forward lookup zone, only the England DCs are listed. Should we add our GCs? Could there be another reason?
More aboutlogon servers available
You answered your own question there. Use the stable servers as primary DNS.