Microsoft Lync Server 2010 Autodiscover Service–not to be confused with Exchange Autodiscover Service–is a new Lync Server service introduced in the Lync Mobility feature update that was released in Cumulative Update for Lync Server 2010: November 2011
Read more at source: Lync Server 2010 – Mobility Deep Dive – Autodiscover Service
Cheers,
Anderson Patricio
http://blogs.msexchange.org/patricio
http://www.andersonpatricio.ca
Twitter: @apatricio