If you have installed Microsoft Lync (either 2010 or 2013) with the evaluation software, you get 180 days before the license expires. At this point, you need to let Lync know that you have purchased a valid license.
If you fail to do so, you will get this error:
The service is shutting down due to an internal error.
Error Code: C3E83203!_HRX! (SIPPROXY_E_TB_EXPIRED!_HRM!)
Cause: Check the previous entries in the event log for the failure reason.
Check the previous event log entries and resolve them. Restart the server. If the problem persists contact Product Support Services.
There is no spot to enter a license key in Lync though. How do you do it then? The following KB article explains:
The first thing you want to do is mount the Lync media. Once it is mounted, open the Lync Management Shell as an Administrator and then run the following command:
msiexec.exe /fvomus <Drive Letter>:SetupAmd64SetupServer.msi EVALTOFULL=1 /qb
After this finishes, run the following:
You need to repeat this procedure on every Lync Front-end, Director, and/or Edge server that is running the evaluation copy.
Fairly easy to do but if you forget, your Lync services will stop running.
Adam Ball, PEI