Format and Portal Customizations > Restricting User IDs to Single Sessions
  
Version 10.2.00
Restricting User IDs to Single Sessions
To restrict a user ID from signing on multiple times with the same or different browsers, modify the portal.properties file. The last user ID to login will have access to the portal. Other users with same login will be logged out.
The portal.properties file is located here:
Linux:
/opt/aptare/portalconf/portal.properties
Windows:
C:\opt\aptare\portalconf\portal.properties
1. Update the following section:
portal.security.allowUserToLoginMultipleTimes=false
2. Restart the Tomcat Portal services after making your modification.