for Microsoft Lync integration we need a SRV record with "_tls" protocol in the DNS settings.
Currently the only available options in the protocol-dropdown menu are "tcp","_tcp","udp" and "_udp". We had already a session with Barracuda-support and got a workaround by directly editing the ".domain.zone" file.
Unfortunately this workaround will be overwritten every time changes are made in the DNS configuration.
I would be glad to see this implemented in any fashion.