Issue: Unable to join Skype for Business/ Lync meeting remotely using Mac Book.
Recently I came across very strange issue. Skype for Business/ Lync Meeting join was working remotely using windows computer/laptop, Mobile app however meeting join was NOT working using Mac book..
There was no issue when Windows client join meeting means external meeting Join URL and reverse proxy was working.
Also Skype for Business meeting join was working correctly internally using Mac Book hence there is something wrong externally or on Reverse Proxy only.
Hardware load balancer was working correctly and all required port was open on external firewall hence concentrated on Reverse Proxy server.
Even Reverse Proxy was working because remember windows client was able to join meeting correctly so this was strange issue.
Hence I reset the IIS on reverse proxy server. (I use IIS ARR for Reverse proxy)
This actually did the trick and meeting join started externally using Mac Book.
I don’t know what was different when Mac Safari browser was joining meeting. Looks like when I try to join the meeting using Mac, this was quering the meeting URL which will go through the reverse proxy, here it might not activate the Lync client and the traffic will flow through the reverse proxy, joining a meeting might fail if there are any issues with the reverse proxy.