We have a Skype for Business Server 2015. [On-Prem]
We just tried to renew our external Skype Certificate. I did the CSR via the integrated Skype tool and also imported it via the skype tool. No failueres, no warnings, services starting without problems. But audio/video dosn´t work with external users, chat works. It just says connecting... for some seconds and then fails due to network issuses. When i switch back to my old certificate it works fine.
Checked the SAN of the new Certificate they are identical to our old one. Also tried our wildcard Certificate (i know its note supported, but should work too). Same problem.
Anyone had this problem? Any ideas?