As a practical matter, you may choose to use Centrify zones to ease migration to Active Directory by creating a separate zone for each legacy identity store. However, you can also use zones to group computers by department, by function, or by any other criteria you choose. Using zones in this way gives you a great deal of flexibility in controlling who has access to the UNIX, Linux, and Mac OS X computers in your environment and makes it easier to set up account information for new users based on job function or other criteria.
Through role assignments, zones provide a scope of resources particular users can access, allowing you to define who can do what on which computers. For example, all of the computers in the finance department could be grouped into a single zone called “finance” and the members of that zone could be restricted to finance employees and senior managers, each with specific rights, such as log on to a database, update certain files, or generate reports. This gives you better control over access to systems based on well-defined roles. You can also limit access to certain types of applications, such as database management utilities or web services. For example, you can define specific actions specific users are allowed to perform by assigning them different roles in different zones.