How to configure the GroupWise WebAccess gwac.xml

How to configure the GroupWise WebAccess gwac.xml

See Managing User Access: Controlling WebAccess Usage (GW2012, GW2014) for details on allowing, preventing, etc.
The configuration file is by default: /var/opt/novell/groupwise/webaccess/gwac.xml
Note: The Distribution List (DL), Post Office (PO) and Domain names are case-sensitive. Verify they match case according to their names in ConsoleOne or WebAdministration.

1. After making changes to the gwac.xml, verify the xml is valid with the following command:
   xmllint gwac.xml; echo $?
   
   Note: If there are any problems, the very last line will return something other than 0 (If $? equals 0, then the file is valid xml, if it is anything other than 0, it is not valid xml, and problems should be displayed above). When webaccess encounters a syntax error in the gwac.xml file, the file is ignored and no error indication is given.
   
   
2. After saving changes to the file, tomcat will need to be restarted:
   rctomcat6 restart
   
   Note: If the server is running OES, then Novell's tomcat should be restarted instead: rcnovell-tomcat6 restart.