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03 Troubleshooting
Server
Domino requirements when connecting to external LDAP directories

Beginning with Release 5.0.3, if you use directory assistance to connect a Domino server to an external LDAP server, the Domino server making the connection must be able to search the objectClass attribute of entries. This change means that if the Domino server connects anonymously, the external LDAP server must allow anonymous searches of the objectClass attribute for people (to allow Web user authentication or Notes mail addressing to people) and the objectClass attribute for groups (to allow group ACL authorization or Notes mail addressing to groups). If the Domino server connects using a name and password, the LDAP server must allow similar objectClass attribute access for authenticated searches.

If the Domino server cannot search the objectClass attribute, Web user authentication, group ACL authorization, and mail addressing fail.