#93 Support for Lync Autodiscover

[Stefan Becker]

Triggered by discussion thread [0958f2af].

Lync clients use a new HTTP-based discovery protocol which directly returns the home server name without involving DNS or SIP handshake. In the case seen by the user this circumvents using IPv6 conection for talking to SIP, because the home server only has a IPv4 address.

Links:

• [MS-OCDISCWS]
• Understanding Autodiscover in Lync Server 2013

[Stefan Becker]

Implemented in git commit 025c055

Verified with my Office 365 test account: with Lync Autodiscover we connect straight to the home server. No DNS SRV/A requests, no 301 redirect responses from the SIP server.