The only solution to this was to rebuild the LDAP database.
- Step 1: Stop Zimbra Services. In my server, I have a recent Zimbra LDAP backup located under /opt/zimbra/backup directory . ...
- Step 2: Backup Zimbra LDAP Data. ...
- Step 3: Restore Zimbra LDAP database from backup. ...
- Step 4: Start Zimbra Services.