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Lync 2013 - No connectivity with any of Web Conferencing Edge Servers
After patching Lync 2013 front end servers with March 2017 CU, I get loads of event id 41025, 41026 on FE servers. Any one else seen this and got some tips? Connection to the Web Conferencing ...
Hey
There is a new Technet Blog article about these Issue (with workarounds):
https://blogs.technet.microsoft.com/uclobby/2017/05/24/lyncsfb-server-event-41026-ls-data-mcu-after-may-2017-net-framework-update/
I found the following solution.
The .Net Framework 4.6 and 4.6.1 rollup was also installed at the same time.
https://support.microsoft.com/en-us/help/4014510/description-of-the-security-and-quality-rollup-for-the-net-framework-4
Had to add the following registry key and restart the web conferencing service.
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft.NETFramework\v4.0.30319]
"RequireCertificateEKUs"=dword:00000000
It helped. Thanks a lot.