You may see the following LDAP error:
Caught exception the specified LDAP directory service cannot be contacted
The LDAP Server is unavailable.
Name resolution of the Domino server.
1- Verify LDAP server is enabled and running on the Domino server
2- Verify source LDAP port is set to 389
2- On the screen where you specifiy Domino server; use FQDN of Domino server:
3- On the screen where you specify Username; use Username with NO NotesDomain:
4- Save and activate the connector
5- Perform another sync process