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"Server issues are affecting calls. Try signing out and back in again."

By fnanfne ·
Hi all,

As per subject, I started seeing this error on the Lync icon in the taskbar (notification area) around a month ago. This is not a problem per se as Lync works for the most part, internally. However, external users cannot connect receiving a plethora of error messages...

1) "There was a problem verifying the certificate from the server" (this particular error disappeared after I renewed the expired certificate)
2) "Lync couldn't find a Lync Server for OURDOMAIN.com. There might be an issue with the Domain Name System (DNS) configuration for your domain. Please contact your support team."
3) "We're having trouble connecting to the server. If this continues, please contact your support team."
4) "The server is temporarily unavailable. If the problem continues, please contact your support team."

Mobile users however, iPhone, Samsung etc.. works just fine, even if connecting externally.

From my online searches, possible issues include...

1) Problem in that your Lync EDGE server is not communicating with the front end Lync server.
2) No DNS entry for the Lync EDGE server in AD.
3) Port 5062 isn't open on the firewall to the internal network.

None of these seem to apply in my situation. It cannot be a DNS issue, DNS entries do not just spontaneously disappear right? This worked fine and then one day, all of a sudden, it stopped working.

Following from point 1 above, during my troubleshooting, I noticed that both our certificates on the Edge server had issues; the internal one expired and the external one (from Digicert) was disabled for some reason. For the internal one, I had to join the Edge server to our domain temporarily in order to renew the expired certificate. I could not do an offline request. For the external one, I had to use the Digicert utility to enable the certificate again.

I have only one tool I can use to troubleshoot, the Lync Server Logging Tool but I'm not familiar with this tool and cannot seem to generate ANY logs so I'm not sure about it's use...

Any insight, help or suggestions is highly appreciated.

Thanks for reading!

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