[Freeswitch-users] How to preserve To: header between two legs of the call

Good day, The scenario is that FS receives INVITE with: From = A, To = B, request line = C FS on an outgoing leg will change it so that To header inherits the value from the request line (essentially, destination number): From = A, To = C, request line = C What should I do in the dial-plan to prevent FS from putting destination number "C" in the To header, and instead retain the value "B" from the incoming leg? Thank you! -Victor