Mar 23 2020
I use Skype for Business on my laptop (works fine).
I can also use it on my old phone (Huawei P9 Lite), but on my Samsung Galaxy S9+ it fails when I try to log in (no connection to server).
User/password/Skypeversion is the same (Huawei vs. Samsung)
S9 is up to date - so is Skype for Business.
I contacted Samsung - they say it is a compatibility-issue and should be fixed with an update from Skype/Microsoft.