Teams app worked fine in other network(including mobile app).
I can not even login to Teams only through our customer's secure Network.
But, Meeting app worked fine in the same secure network.
So the reason could be that customer's network does not allow Teams login procedure.
Any one have similiar experience or tips? will be very appreciated.
(1) clicked the log in button

(2) white screen 0.2~0.3 seconds?

(3) then same login screen.
