Diversion to internal vs external number

[petr.necas]

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.

[lundah]

I would give that option a try anyway. Things don't always act the way you would expect to by the way the option is labeled.

[petr.necas]

I tried, but there wasn't any change in the outgoing INVITE request.

I'm talking to Mitel support about this issue already, I will share if there is any solution.