Applies to ONTAP 9 LDAP Issue Event log / EMS: Examples: Vserver(xxxxxx) could not authenticate over the network to server (xxxxxx). Error: Strong(er) authentication required (Service: LDAP (Active Di...Applies to ONTAP 9 LDAP Issue Event log / EMS: Examples: Vserver(xxxxxx) could not authenticate over the network to server (xxxxxx). Error: Strong(er) authentication required (Service: LDAP (Active Directory), Operation: SiteDiscovery) Unable to connect to LDAP (Active Directory) service on **** (Error: Strong(er) authentication required) secd: secd.strong.auth.required:alert]: Stronger authentication enforced by LDAP server for Vserver xxxx.