https://bugs.winehq.org/show_bug.cgi?id=39091
--- Comment #1 from Austin English austinenglish@gmail.com --- (In reply to Jens Staal from comment #0)
Lync Web app requires Windows version >7 (set in winecfg)
most likely this will be the same for "Skype for Business" web app
Visit a page seving an invitation for a Lync meeting (can be found via Google, or if you have your own invitation)
Could you post a working URL please?