Index: lams_build/conf/unix/lams/lams.xml
===================================================================
diff -u -rc0662ab693e1886370246632176ad0ebf3e7485c -r9437b396ea753716b90221a4cef08ff948bfe5c8
--- lams_build/conf/unix/lams/lams.xml	(.../lams.xml)	(revision c0662ab693e1886370246632176ad0ebf3e7485c)
+++ lams_build/conf/unix/lams/lams.xml	(.../lams.xml)	(revision 9437b396ea753716b90221a4cef08ff948bfe5c8)
@@ -23,6 +23,8 @@
 	<AllowMultipleLogin>false</AllowMultipleLogin>
 	<!--  Turn on the cache debugging listener. Set to false in production -->
 	<UseCacheDebugListener>false</UseCacheDebugListener>
+	<!--  Number of days after which preview session data may be deleted. Recommend 7 days -->
+	<CleanupPreviewOlderThanDays>7</CleanupPreviewOlderThanDays>
 	<!--  client updates -->
 	<AuthoringClientVersion>1.0</AuthoringClientVersion>
 	<MonitorClientVersion>1.1</MonitorClientVersion>