We migrated an old 2003 Server running 2003 exchange to a new server running 200R2 Exchange 2010. The 2003 server has been decommissioned and turned off. Mail is flowing but I see an error in the event log:
The topology doesn't contain a route to Exchange 2000 Server or Exchange Server 2003 OLDSERVER.local in Routing Group CN=first routing group,CN=Routing Groups,CN=first administrative group,CN=Administrative Groups,CN=DOMAIN,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=ABCDE,DC=local in routing tables with the timestamp 1/19/2013 3:40:53 PM.
Any ideas on how to correct this?