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Exchange 2010 errors

I keep getting this error in the event logs. We are running SBS 2011 and Exchange 2010 -

Log Name:      Application
Source:        MSExchangeRepl
Date:          10/23/2011 3:56:44 PM
Event ID:      2121
Task Category: Service
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      DSDC2.xxx.local
The Microsoft Exchange Replication service failed to start the TCP listener. Error: System.Net.Sockets.SocketException: An attempt was made to access a socket in a way forbidden by its access permissions
   at System.Net.Sockets.Socket.DoBind(EndPoint endPointSnapshot, SocketAddress socketAddress)
   at System.Net.Sockets.Socket.Bind(EndPoint localEP)
   at Microsoft.Exchange.Cluster.Replay.TcpListener.StartListening()
1 Solution
The only time I've received a 2121 error is when it could not communicate with the domain controller.  My description read "The Microsoft Exchange Active Directory Topology service on server localhost did not return any suitable domain controllers."

Your event 2121 is however different, and unfortunately a bit more cryptic.  First thing I'd suggest is that you don't think about your Cisco PIX. The error is local to the SBS server itself, and has nothing to do with your Cisco Firewall.

Unfortunately, the only thing I can ask you to check is to ensure that the Log On As is set to "Local System", and not a user or Network Service.  If it is not set to "Local System" can you use the Log On tab to choose "Local System account"

 Microsoft Exchange Replication Properties
RLComputingAuthor Commented:
Thank you

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