Disable simultaneous logins from different sessions - Liferay

If you want to prevent simultaneous logins from different session add the following properties to portal-ext.properties file.

     ##
     ## Live Users
     ##

    #
    # Set this to true to enable tracking via Live Users.
    #
    live.users.enabled=true

    #
    # Set the following to true if users are allowed to have simultaneous logins
    # from different sessions. This property is not used unless the property
    # "live.users.enabled" is set to true.
    #
    auth.simultaneous.logins=false


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