Release 5U1 is a maintenance release that fixes bugs in Release 5 Directory Proxy Server . Release 5U1 Directory Proxy Server is still an LDAP proxy, but with new, extensible routing capabilities. Release 5 also enables the Virtual Directory feature, the ability to aggregate multiple data views in a single view. These data views can represent LDAP or SQL accessible data stores.
For more information, see the Sun Java System Directory Server Enterprise Edition 6.2 Release Notes.