Unique attributes
The Unique Attributes feature ensures that the specified attributes always have unique
values within a directory. These attributes can be specified in two entries only,
cn=uniqueattributes,cn=localhost and
cn=uniqueattributes,cn=IBMpolicies.
The values for a unique attribute are stored on the server where the attribute is designated as
unique. Search results for unique attributes are unique for that server's database only. Search
results that include results from referrals might not be unique.
Note: Binary attributes,
operational attributes, configuration attributes, the
CN attribute and the
objectclass attribute cannot be designated as unique.