Before EXACT v12.5 it was possible for a User to add another User to the same Security Group.
From v12.5 it becomes possible for a User to add a User to a different Security Group, given the appropriate settings.
To enable User 1 to add User 2 to a different Security Group
With this security item checked, EXACT enables logged-in users to add a new user into a different security group to their own.
If this security item is un-checked, the logged-in user is able to add a new user only to the security group to which that logged in user belongs to (as for pre v12.5 functionality).
Your result will display in the Can Create Groups field: