Anyone following Lync should know by now that Microsoft (finally) released a Lync 2010 client for Windows Phone today. Microsoft also officially announced that Lync 2010 clients for iPhone, iPad, Android, and Nokia Symbian have been submitted for approval to their respective app stores. Availability can be tracked here.
The Lync 2010 mobile clients combine instant messaging, conferencing, and calling features in a single application that’s both familiar to Lync users and optimized for mobile productivity.
The Lync 2010 clients can be used to connect to on-premise deployments of Lync Server 2010 or Lync Online in Office 365, both of which require some configuration before mobile clients can connect.
To allow mobile clients to connect to Lync Online in Office 365, you will need to add a DNS CNAME entry for Lync mobile devices, which is covered here.
To allow mobile clients to connect to an on-premise deployment of Lync Server 2010, you will need to install cumulative update for Lync Server 2010: November 2011, and then enable Mobility, which is covered here.