Hello Kamailions, I'm running into the following challenge. A kamailio setup where phones register with their mac address as uid and a password. Users have to login to the system by dialing a special number where they have to enter their internal extension and a pin code. Now the system knows which extension(number) is logged in on which phone(macaddress). This is done with from updates, just a type of hotdesking. Now I want to  use presence.... When a phone makes a phone call, kamailio generates a publish message where the "local" part of the xml code contains the mac address. How can I manipulate the Publish xml information? I mean the manipulation can be done with textops, but which variables to use and where in the configuration? Im asking because when I disable the presence route and do not call it in my configuration, but with presence enabled, I still get Publish messages.... I have tried adding a Sender header which contains the "extension" of the phone and then call the publish in the PRESENCE route like this: handle_publish("$hdr(Sender)"); But this does not change the xml information. Am I doing things wrong? Below the first publish message that is send, where 10.88.77.172 is the kamailio server. U 2019/06/26 14:54:37.233345 10.88.77.172:5060 -> 10.88.77.172:5060 #7 PUBLISH sip:0015659a9931@10.88.77.172:5060 SIP/2.0. Via: SIP/2.0/UDP 10.88.77.172;branch=z9hG4bK1a87.5510d093000000000000000000000000.0. To: <sip:0015659a9931@10.88.77.172:5060>. From: <sip:0015659a9931@10.88.77.172:5060>;tag=a2652bb825a097f3b7285d4c70edd51a-5c5d. CSeq: 10 PUBLISH. Call-ID: 173009c21f4e3c77-94480(a)10.88.77.172. Content-Length: 579. User-Agent: kamailio (5.1.8 (x86_64/linux)). Max-Forwards: 70. Event: dialog. Expires: 125. Content-Type: application/dialog-info+xml. . <?xml version="1.0"?> <dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="0" state="full" entity="sip:0015659a9931@10.88.77.172:5060">   <dialog id=&quot;0_2285997339(a)10.88.77.184&quot; call-id=&quot;0_2285997339(a)10.88.77.184&quot; direction="initiator">     <state>Trying</state>     <remote>       <identity>sip:604113@10.88.77.172:5060</identity>       <target uri="sip:604113@10.88.77.172:5060"/>     </remote>     <local>       <identity>sip:0015659a9931@10.88.77.172:5060</identity>       <target uri="sip:0015659a9931@10.88.77.172:5060"/>     </local>   </dialog> </dialog-info> I would like to change the local identity and target uri into the extension assigned to that phone, for example 604114.... So that subscribers to the extension 604114 get informed about the state of the phone with the used uid 0015659a9931. Feedback would be appricated. Pointers to where I am going wrong as well, ... that's feedback too. Rgds, Gertjan