This configuration parameter specifies a unique prefix for a trusted domain. You must specify a whole number in the range of 0 to 511.

The Centrify algorithm for generating unique identifiers combines the prefix with the lower 22 bits of each user or group RID (relative identifier) to create unique UNIX user (UID) and group (GID) IDs for each user and group in the forest and in any two-way trusted forests.

Ordinarily, you do not need to set this parameter because the Centrify agent automatically generates the domain prefix from the user or group security identifier (SID). However, in a forest with a large number of domains, domain prefix conflicts are possible. When you join a computer to a domain, the Centrify agent checks for conflicting domain prefixes. If any conflicts are found, the join fails with a warning message. You can then set a unique prefix for the conflicting domains.

In most cases, you set this configuration parameter using group policy. You can, however, set it manually in the configuration file if you are not using group policy or want to temporarily override group policy.

To set this parameter, append the domain name and specify a prefix in the range 0 - 511. For example: 3 4 5

The default behavior, if you do not set this parameter, is for the agent to automatically generate the domain prefix from the user or group security identifier (SID).