Types of Users

Two types of users exist in the CA Unified Infrastructure Management solution—bus users and account contact users. The permissions for both user types are set in the access control list (ACL). Administrators can create users of these two types to meet their security or multi-tenancy needs. 
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types_users
Two types of users exist in the CA Unified Infrastructure Management solution—
bus
 users and 
account contact
 users. The permissions for both user types are set in the access control list (ACL). Administrators can create users of these two types to meet their security or multi-tenancy needs. 
The following chart describes the key differences between bus users and account contact users.
Bus Users
Account Contact Users
Managed in Admin Console or Infrastructure Manager.
Managed in the Account Admin portlet.
Stored in the hub security file.
Stored in CM_ database tables. 
Can see all data, systems, and alarms within UIM.
Can only see data, systems, and alarms with origins that match at least one of the account's origins.
Can access legacy Windows UIs.
Cannot access legacy Windows UIs. 
Can access the bus, callbacks, and messages.
Cannot access the bus.