Hello Experts, 

I wanted to check, is there any way to modify the username part of the Refer-To header in Kamailio? For example, I am getting the following header:

REFER-TO: <sip:sip.abc.domain.com:5061;transport=tls; ..... ; .... ; ...>

the username part is missing. 

Can I add a username inside it? For example, change it to 

REFER-TO: <sip:123@sip.abc.domain.com:5061;transport=tls; ..... ; .... ; ...>

REFER-TO: <sip:test-kam@sip.abc.domain.com:5061;transport=tls; ..... ; .... ; ...>

I could not find any solution in the mailing list, the only way was to remove the header and then re-add it. 

Thank you! 

Regards, 

Shah Hussain