Specialized Administration > Ensuring Data Security > Security Labels and Agreements > Configuring Security Labels > Security Label Configuration Steps > Step 10. Enable Setting Security Labels on Explorer Windows - Required
  
Step 10. Enable Setting Security Labels on Explorer Windows - Required
Add the com.ptc.windchill.explorer.monitorXmlConfigChanges property to the site.xconf file to enable the Set Security Labels step on the Product Structure Explorer or the MPMLink Explorer windows.
From within a windchill shell, run the following command:
xconfmanager -s com.ptc.windchill.explorer.monitorXmlConfigChanges=true -t codebase/wt.properties -p