When users log on through Unity, a session may address any one of the connected Teradata Vantage systems, so user privileges should be the same on all database systems. If some users can also log on directly to a database system, for example, to perform administrative duties or to access data that is not shared with other systems, you may need to grant special privileges to a few users for that system.
For information about Unity, see Teradata® Unity™ Installation, Configuration, and Upgrade Guide for Customers, B035-2523 and Teradata® Unity™ User Guide, B035-2520.