I'm afraid we don't have anyone else to federate with at the moment and only have network access to Office 365 to test. Connectivity tester doesn't reports any errors:
Testing remote connectivity for user <a user> to the Microsoft Lync server.
The specified user successfully signed in to Microsoft Lync server remotely through the Lync Access Edge Server.
Additional Details
Elapsed Time: 2307 ms.
Test Steps
Attempting to resolve the host name sip.<our domain> in DNS.
The host name resolved successfully.
Additional Details
IP addresses returned: <the IP>
Elapsed Time: 351 ms.
Testing TCP port 443 on host sip.<our domain> to ensure it's listening and open.
The port was opened successfully.
Additional Details
Elapsed Time: 279 ms.
Testing the SSL certificate to make sure it's valid.
The certificate passed all validation requirements.
Additional Details
Elapsed Time: 429 ms.
Test Steps
The Microsoft Connectivity Analyzer is attempting to obtain the SSL certificate from remote server sip.<the domain> on port 443.
The Microsoft Connectivity Analyzer successfully obtained the remote SSL certificate.
Additional Details
Remote Certificate Subject: CN=sip.<our domain ,,, certificate details>.
Elapsed Time: 390 ms.
Validating the certificate name.
The certificate name was validated successfully.
Additional Details
Host name sip.<our domain> was found in the Certificate Subject Common name.
Elapsed Time: 0 ms.
Certificate trust is being validated.
The certificate is trusted and all certificates are present in the chain.
Test Steps
The Microsoft Connectivity Analyzer is attempting to build certificate chains for certificate CN=sip.<our domain>
One or more certificate chains were constructed successfully.
Additional Details
A total of 1 chains were built. The highest quality chain ends in root certificate <Public CA Certificate>
Elapsed Time: 14 ms.
Analyzing the certificate chains for compatibility problems with versions of Windows.
Potential compatibility problems were identified with some versions of Windows.
Additional Details
The Microsoft Connectivity Analyzer can only validate the certificate chain using the Root Certificate Update functionality from Windows Update. Your certificate may not be trusted on Windows if the "Update Root Certificates" feature isn't enabled.
Elapsed Time: 2 ms.
Testing the certificate date to confirm the certificate is valid.
Date validation passed. The certificate hasn't expired.
Additional Details
The certificate is valid. NotBefore = <date/time>, NotAfter = <date/time>
Elapsed Time: 0 ms.
Testing remote connectivity for user <sip for user> to the Microsoft Lync server.
The specified user successfully signed in to Microsoft Lync server remotely through the Lync Access Edge Server.
Additional Details
Registration completed successfully.
Elapsed Time: 981 ms.
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Edited by
PanosE
9 hours 17 minutes ago