Hide User Last Active Time Stamp (Lync Server 2013 Modification)
Mostly it is misinterpreted and secretly used for user activity monitoring. There Microsoft introduced an update with Lync Server 2010 CU6 and enabled without additional costs a simple and easy way removing this LastActive Attribute from the Users Lync Object.
After you apply this solution, only newly written/ detected activity time stamps are effected. In other words, if the user object was Lync enabled before has not yet logged into Lync again, the last time stamp is still visible, as you can see in the illustration below.
As well remember, this setting affect all user hosted on the Front-End Server (Pool) and cannot be set to individual users.
1. Create a text file, named Rtcaggregate.exe.config in the Lync Server 2013 Folder, e.g. C:\Program Files\Microsoft Lync Server 2013\Server\Core
2. Add the following configuration information into the .config file
<add key="PublishLastActive" value="false" />
3. Now restart the Lync Server Front-End Service (RtcSrv)
Stop-CsWindowsService -Name "RtcSrv"
Start-CsWindowsService -Name "RtcSrv"
Author: Thomas Pött Managing Consultant Microsoft UC