Windows 8 has a Lync client that can be installed from the Windows App Store (formerly known as Lync MX). This new Lync client has active tiles which also shows you your upcoming appointments in a tile. For this to work it connects to your Microsoft Exchange environment using autodiscover.
There are multiple ways you can deploy and configure autodiscover. If you’re only using a service record (SRV) in DNS for autodiscover (_autodiscover._tcp.smtpdomain.com) you will notice that the Lync client cannot connect to the Exchange Web services. For now it is not known if Micorosoft will change the client for it to work. A workaround could be to add an A-record to DNS, autodiscover.smtpdomain.com.
Here a video showing you the Windows 8 Lync client functionality.