Without Call Forwarding: the network or user provided Calling Line Identification Presentation (+1 111 11111111) has to be displayed on the soft phone.
With Call Forwarding: the network or user provided Calling Line Identification Presentation (+1 111 11111111) has to be displayed on the phone the call gets forwarded to.
If +49 911 376XXX-0 isn't assigned to our company it shouldn't show up anywhere and shouldn't be configured in the system at all