[SR-Users] No ACK from MS Teams

[Juha Heinanen]

Pepelux writes:

> Try to put SBC-FQDN instead of SBC-IP-ADDR in the Record-Route:
> 
> Record-Route: <sip:*SBC-FQDN*
> :5060;ftag=c3da9477e05d45fca31c24a155af3318;lr=on>

Also, it better to follow OpenSIPS tips on the matter

https://blog.opensips.org/2019/09/16/opensips-as-ms-teams-sbc/

since it also mentions how to handle R-R in replies.  Author of the
Kamailio one has not bothered to update his.

-- Juha