I have an Active Directory setup with two sites and three DC's - call them 1A, 1B, and 2. DCs 1A and 2 are Win2008R2 and DC 1B is Win2k. So the domain functional level is Windows 2000 native. The two sites are connected via IP transport/VPN tunnel.
I recently promoted DC 2 so that I could have a DNS server at site 2 and ensure name resolution even if the VPN tunnel failed. Everything has gone to plan except for this pesky error I have been seeing occur every 15 minutes:
Preferred bridgehead servers have been selected to support intersite replication with the following site using the following transport. However, none of these preferred bridgehead servers can replicate the following directory partition.
This error occurs twice, once for
ForestDNSZones and once for
Now, I did a little Googling and it seems like this is a common error for "remote DC" setups but I am pretty much lost as to do about it. One thing I did try was to make DC 2 its own preferred IP/SMTP bridgehead server as well as DC 1A its own, and leave 1B with no preferred status on transports. This seems to have had no effect.