On the Call details tab at the SIP-Trunk I have configured a SIP URI. For Forwarding / Twinning in the local URI field I have configured "Original caller". See the attached screenshot. If an external called is twinned to an external destination, the original caller is presented at the external destination. If an external call is forwarded, the caller is presented at the external destination. See the attached traces. It also should be presented the original caller.