Yealink T46G Administrator's Manual page 91

If it is disabled, you cannot sign into the Skype for Business Server using web sign-in
-
method.
Click Confirm to accept the change.
3.
To sign into Skype for Business Server using Web Sign-in method via phone user
interface:
Press the Sign in soft key.
1.
Press , or the Switch soft key to select Web Sign-in.
2.
Press the Sign in soft key.
3.
Configuring Basic Features
77