Lync sets your status to “inactive” when your computer has been idle for five minutes, and to “away” when your status has been inactive for five minutes.(To change these default values, click the Options button , click Status, and then click the arrows next to Show me as Inactive when my status has been idle for this many minutes and Show me as Away when my status has been Inactive for this many minutes.) You can also select this status from the drop-down arrow.Microsoft is conducting an online survey to understand your opinion of the Msdn Web site.If you choose to participate, the online survey will be presented to you when you leave the Msdn Web site. If your Lync 2013 client has the September 2013 update installed your Lync client version will be 15.0.4535.1002.This issue is being actively being investigated by the Lync team at Microsoft so stay tuned.
Recently there as been many reports of Presence issues with the Lync 2013 client.
Before we begin troubleshooting, it is important to understand how Communicator pulls the free/busy information from Exchange.
Figure 1 illustrates the flow of information when Communicator pulls free/busy calendar information from Exchange and Outlook. How Communicator pulls free/busy information Depending on the versions of Outlook and Exchange, Communicator will use one of two different methods to pull the information.
The issue is documented in this support KB article: Presence status isn’t updated based on Exchange calendar in Lync 2013.
In a nutshell there is an issue with the integration between the Lync 2013 client and Exchange which impacts the synchronization between the Lync 2013 client and the Outlook calendar information (such as “in a meeting”) and the Out-Of-Office status.