When using the Lync Client to “Schedule a Meeting” with an internal contact the Scheduling Assistant page doesn’t provide Free/Busy information for the invited contact, unless the invite window sits open for over 5 minutes. Reproduced this issue in: Lync Client 2010, Lync Server 2010, Exchange 2010 Lync Client 2010/2013, Lync Server 2013, Exchange 2007 Lync Client 2013, Lync Server 2013, Exchange 2013 Lync Client 2013 CU1, Lync Server 2010 CU1, Exchange 2013 CU1