Sep 05 2019
I had a case with a customer, that was interesting and thought to share it with you.
The customer complained, that some users can see the option to "Make a Test Call" under their client’s settings, and some can't.
the problem was with localization of the client itself, find out more and about the work around here
Oct 25 2019
@MoeEid Make sure that Teams language is set to English otherwise the button is hidden.