Hi all, Our mail server is also our root domain controller. Recently we have been having issues with AD replication. When the mail server is restarted all replication works fine. But after an hour or so we are back to the repl problems. I am seeing 1311 and 1265 events and also when I run AD replication monitor the reason for the repl. failure is that the remote procedure call fails. We have a few local connected branches and repl. works fine there...however the branches over our WAN link is having problems. Can someone shed some light? Scott