10/29/2018 5:41:31 PM - NAT/ALG check:L:803.1[Extn:775] REQUEST 'INVITE' - some of SIP/SDP headers may contain inconsistent information or modified by intermediate hop SIP proxy detected: Via:SIP/2.0/UDP 127.0.0.1:5080;branch=z9hG4bK-524287-2---Pj029acb34-c4d0-4544-b4f1-ac1ada997621;rport=5080 Via:SIP/2.0/UDP [::ffff:185.191.204.156]:39456;branch=z9hG4bK-524287-1---tunneltid;rport;tnlid=clnt.1-3a81c21b-4112-4f0f-b74d-0cf45b537622 Via:SIP/2.0/TCP 127.0.0.1:50195;rport;branch=z9hG4bKPj029acb34-c4d0-4544-b4f1-ac1ada997621;alias
Please navigate to the extension settings / Phone provisioning pick the 3CX client from the drop down list and make sure that the option " Block Presence information in 3CX Clients / Webclient" is not enabled.