In VMware NSX-T, a federation setup has a Global Manager and at least one Local Manager.
The sync status from the GM and LM both show successful and green.
However, from the Identity Firewall AD settings in the standby LM, the synchronization status for the LDAP server is showing failure.
The active LM does not have this failure status.
The error message indicates "Cannot connect to any LDAP server in domain <domain-name>" and a timestamp can be found from the browser's developer console, which is a while ago (not up-to-date).
There are no other averse effects of this issue. The LDAP users can still log in to NSX.
This is a cosmetic issue.
VMware NSX-T 3.x
This is caused by the standby LM site that has an outdated AD synchronization status
Send a POST API call to https://<Standby-site-LM>/policy/api/v1/infra/full-sync-action?action=request_full_sync