You are automatically logged out of the Enforce console after 30 minutes of inactivity and receive the message: " Your session has expired and you will be logged off "

Relevant Versions:  

DLP Versions 15.8 and above:

C:\Program Files\Symantec\DataLossPrevention\EnforceServer\<version>\Protect\tomcat\webapps\ProtectManager\WEB-INF\web.xml

   <session-config>
        <session-timeout>30</session-timeout>
    </session-config>

Change the default settings from: 30 to 600 (from a half-hour to 10 hours)

   <session-config>
        <session-timeout>600</session-timeout>
    </session-config>

In addition, you must also increase the lock timeout to the equivalent time in milliseconds:

http://www.calculateme.com/Time/Minutes/ToMilliseconds.htm

To increase the lock timeout :

• DLP versions 15.8 and above:

Change model.lockserver.locktimeout in

C:\Program Files\Symantec\DataLossPrevention\EnforceServer\<version>\Protect\config\Model.properties

CHANGE DEFAULT FROM:
model.lockserver.locktimeout = 1800000
TO:
model.lockserver.locktimeout = 36000000

Restart all SymantecDLP services on the Enforce server.

NOTE:  Never adjust the UI session timeout without setting the lock timeout to the same value. Otherwise the application behavior may be nondeterministic.