Cisco Cisco Expressway
B2BUA problems
B2BUA Lync Server status reports "Unknown" or "Unknown failure"
Check that the Expressway application has been added to the Lync trusted application pool and is configured
to contact the Expressway B2BUA via port 65072 . See
to contact the Expressway B2BUA via port 65072 . See
for more
information.
Lync problems
Run the Lync Server ‘Best Practices Analyzer’ to help identify configurations that may be incorrect on Lync
Server.
Server.
Problems with certificates
If a non-Lync application is used to create certificates to load onto Expressway for use with Lync (for
example when purchased from a certificate authority) it is vital that the Subject name and Subject Alternate
Name contain the same details as they would if the certificates were created by Lync.
example when purchased from a certificate authority) it is vital that the Subject name and Subject Alternate
Name contain the same details as they would if the certificates were created by Lync.
Specifically, if both Subject name and Subject Alternate Name are used, then the name entered in the
Subject name must also appear in the Subject Alternative Name list.
Subject name must also appear in the Subject Alternative Name list.
Microsoft Lync and Cisco Expressway Deployment Guide (X8.1)
Page 52 of 63
Appendix 1: Troubleshooting