Suppose the directory contains a base node, o=sesta, to store a corporation's user data. In addition, there is an index node, o=sesta2, which points to an overlapping subset of users. In this example, sesta.com is the canonical domain name.
To identify the actual organization node, you must decorate the non-canonical organization entry (the index node) with the value of the canonical organization node, inetCanonicalDomainName:sesta.com:
dn:o=sesta,o=rootsuffix sunPreferredDomain:sesta.com
dn:o=sesta2,o=sesta,o=rootsuffix inetDomainBaseDN:o=sesta,o=rootsuffix inetCanonicalDomainName:sesta.com