P-Profile-Key Header

The P-Profile-Key header is defined in RFC 5002, The Session Initiation Protocol (SIP) P-Profile-Key Private Header (P-Header).If the identity of the server user of the request was via a wildcarded PUI, that wildcarded PUI is included in the P-Profile-Key header in the outgoing request to the core. This Header will be included for requests like INVITE, SUBSCRIBE, and so on that match the registered wildcarded PUI. The header will occur in all subsequent requests to the core as well.

For this header to be present, the request needs to be going from access to core and the ims-feature must be enabled on both the access and core SIP interfaces.