I have two DC's, one running Exchange and the other RAS. I am getting NTDS Replication errors on the RAS server. When these errors occur on RAS server, MSFTPSVC errors occur on the Exchange server at the same time. Also, up to a week ago I was getting Browser error on the Exchange server but then it stopped. I made no change to make it stop.
I learned even though the RAS server has one nic, it has to transport adapters. One for DC and the other for RAS. This is was the intial problem which led to Computer Browser error. The RAS transport adapter was taking the backup role and the other DC kept failing on the retrieving the backup lit too many times.
I have dont netdiag and nltest on RAS DC. It skipped the trust relationship test in netdiag. NLTEST failed on /sc-verify:domain. Came back with I_NetlogonControl failed : status - 1355 0x54b ERROR_NO_SUCH_DOMAIN. I have tried the shortname as well as the full doamin name. NLTEST /dsgetdc:domain /gc came back with DC name of server and one of the RAS DHCP assigned IP's rather than the static ip configured on the single nic.