Problems Connecting Communicator Clients to OCS Server from Remote Sites

Problem:
Office Communicator cannot connect to Office Communication Server 2007 (OCS) at corporate office from remote sites.  Communicator can connect without any problem from within the corporate office (where OCS is on the same subnet).  Remote sites are all on VPNs behind a Cisco ASA 5505.

Attempted Solutions:
-Verified that firewall isn't blocking traffic (all IP traffic from subnet allowed).
-Manually entered connection configuration information.
-Verified proper DNS propigation to the client machine.

Ran debug session on OCS and it reports that the client is making a connection and authentication request to the server, but fails in the end with an error: WSAECONNRESET (see debug log snippet below):

**BEGIN LOG SNIPPET**
TL_ERROR(TF_COMPONENT) [0]0518.0C88::06/05/2008-19:48:24.175.00000065 (SIPStack,SIPRouterOutbound::ProcessCompletion:738.idx(475))( 02FF1018 ) Send failed
TL_ERROR(TF_CONNECTION) [0]0518.0C88::06/05/2008-19:48:24.175.00000066 (SIPStack,SIPAdminLog::TraceConnectionRecord:1224.idx(157))$$begin_record
LogType: connection
Severity: error
Text: Connection was closed because a send operation failed
Local-IP: 10.4.0.143:5060
Peer-IP: 10.4.9.116:1354
Connection-ID: 0x6200
Transport: TCP
Result-Code: 0x80072746 WSAECONNRESET
User-Uri: craig@XXX.XXX
$$end_record

TL_WARN(TF_DIAG) [0]0518.0C88::06/05/2008-19:48:24.175.00000067 (SIPStack,SIPAdminLog::TraceDiagRecord:1224.idx(142))$$begin_record
LogType: diagnostic
Severity: warning
Text: I/O error on the socket
Result-Code: 0x80072746 WSAECONNRESET
SIP-Start-Line: SIP/2.0 403 Location profile only available when UC enabled.
SIP-Call-ID: 13e65015e068439e84279d626fb23455
SIP-CSeq: 1 SERVICE
Peer: 10.4.9.116:1354
$$end_record

TL_INFO(TF_COMPONENT) [0]0518.0C88::06/05/2008-19:48:24.175.00000068 (SIPStack,CAUTHRecord::ExpireDisconnectedEndpointContext:406.idx(436))( 00E386B8 ) Expired 00E04FD8
TL_INFO(TF_CONNECTION) [0]0518.0C88::06/05/2008-19:48:24.175.00000069 (SIPStack,SIPAdminLog::TraceConnectionRecord:1224.idx(161))$$begin_record
LogType: connection
Severity: information
Text: Connection closed
Local-IP: 10.4.0.143:5060
Peer-IP: 10.4.9.116:1354
Connection-ID: 0x6200
Transport: TCP
User-Uri: craig@XXX.XXX
$$end_record
**END SNIPPET**Start Free Trial