Topology discovery failed, error details No Suitable Directory Servers Found in Forest XXX.COM Site Default-First-Site-Name..

HI All,

Please kindly assist.

I upgraded my domain Controllers to 2016. After demoting the old DCs.

Error 1: Exchange Server services are not starting.

Error 2: Process Microsoft.Exchange.Directory.TopologyService.exe (PID=2728). The Exchange computer Exch-01 does not have Audit Security Privilege on the domain controller XXX.COM. This domain controller will not be used by Exchange Active Directory Provider

I have confirmed i do have Exchange Server added in the Default Domain Controller Policy in the New DC.

Kindly assist please. Where else can i check to fully restore the connection to the new DC Server.

Thanking you in Advance

Regards,

Ronald.