When a call is diverted to another internal extension the INVITE request contains Diversion header, but when the call is diverted to an external number (using a Speed Call) the Diversion header is not present in the INVITE request.
Is there any option that will enable Diversion header for external numbers?
I found the option "Include Diversion Header for EHDU" in SIP Peer Profile, but this will probably just work for the external hotdesk numbers, not for speed calls.