We are having issues with some extensions successfully registering with 3CX. We are seeing messages such as these in the system activity logs Code: 09-Nov-2015 01:43:49.048 [CM302001]: Authorization system can not identify source of: UnkSrc Recv Req SUBSCRIBE from 10.10.100.200:1028 tid=01aa08f0 Call-IDfirstname.lastname@example.org: and Code: 09-Nov-2015 01:42:22.600 [CM100002]: *!* Exception detected: ParseBuffer.cxx:654, Parse failed Illegal escaping in context: From <sip:%email@example.com.*.*>;tag=68bc0c8xxxxxxb13363884-1488b803 We are also seeing a high number of extension un-registrations. Any one know what we can do to get these phones and extensions registered? Any help will be greatly appreciated.