When logging into my Skype for Business account at work (from my companies domain network) or from a mobile hotspot, everything works nicely. However, at home from my private WiFi, I am unable to log in and SfB is stuck on the "Contacting server and signing in" page forever. This holds true with or without VPN to my companies domain.
I followed basically every step that I could find in forums, ... that did not require admin rights (because I don't have them). This includes deleting sign-in infos and sips, or setting connection to manual.
As I suspect my WLAN to block some kind of necessary traffic here, I opened several ports on my network, so far without any success: TCP 80, 443
What else can/should I do or which settings do I have to use for my network?
When asking my admin, all I was told was that "he could not set up my own WiFi", which is probably correct...