Remote BDC’s do not recognize new PDC

Not having a problem with the PDC on its local network, but nothing on any of the remote networks can be done that requires a PDC, like adding a new computer to the domain or running user manager. PC’s and server can still browse the domain, map drives to other servers, etc. Rebooted one of the BDC’s, and can no longer browse domain or manage the BDC from the central office. Any suggestions?