IdentityAccessManager LDAP configuration is not importing users

Document ID : KB000095478
Last Modified Date : 11/05/2018
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Configured LDAP details in Identity Access Manager and try to sync the user details. But it is not syncing user details. Every time, it shows zero users imported.
Devtest 10.3
Authentication through LDAP
Please verify user-dn details configured properly in Identity access manager configuration and make sure you have added "User Object Classes" value as "person, organizationalPerson, user"
  After making these changes, click on Sync user details button to Sync the users from LDAP.