Migrating your LDAP directory data from Schema 1 to Schema 2 provides Messaging and Calendar servers the following benefits:
Integration with Sun JavaTM System Access Manager, which provides single sign-on (SSO)
Use of the Delegated Administrator console and utility (commadmin) for provisioning the LDAP directory
Use of a single integrated Directory Information Tree (DIT) for all Sun JavaTM Enterprise System products
Access Manager uses Schema 2.
Messaging Server 6 and Calendar Server 6 can use either Schema 1 or Schema 2.
Messaging and Calendar servers cannot obtain authentication services from Access Manager until they migrate to Schema 2.