November 13, 2013 Update: the presence issues with Exchange free/busy that were introduced in the September 2013 Lync 2013 Client update have now been fixed in the November 2013 Update; see Lync 2013 November Update – A Much Anticipated Client Fix.
Recently there as been many reports of Presence issues with the Lync 2013 . . . → Read More: Lync 2013 Presence Issues