Log on to the computer as a member of the RTCUniversalServerAdmins group, or as a member of the CsVoiceAdministrator, CsServerAdministrator, or CsAdministrator role. For details, see Delegate Setup Permissions.

Open a browser window, and then enter the Admin URL to open the Lync Server Control Panel. For details about the different methods you can use to start Lync Server Control Panel, see Open Lync Server Administrative Tools.

In the left navigation bar, click Monitoring and Archiving, and then click Quality of Experience Data.

On the Quality of Experience Data page, click New.

In Select a Site, click the site to which the policy is to be applied and click OK.

In New Quality of Experience Setting, do the following:

• Select Enable monitoring of Quality of Experience (CDR) data to turn on monitoring.
  
  
• Select Enable purging of Quality of Experience (CDR) data to turn on purging.
  
  
• In Keep call detail recordings for maximum duration (days), select the maximum number of days that call detail recordings should be retained.
  
  

Click Commit.