AD errors in DC after a migration to Azure

Question

I recently used Carbonite Migrate to migrate a couple of servers to Azure. One is fine, the other is my DC and I am getting errors in AD - cannot find domain, cannot load forest etc.

Errors from DCDiag - Advertising (error 1355). Netlogons (error 67), Replications (0x2105), NTDS (access denied), GPO errors because it cannot access a DC, my .local domain fails (error 1355)

Some are fine DNS,FrsEvent, DFSREvent, SysVolCheck, KccEvent, KnowsOfRoleHolders, MachineAccount, NCSecDesc, ObjectsReplicated, RidManager, VerifyReferences, ForestDNSZones, DomainDNSZones, Schema

I am looking for a way to recover this - I have a backup locally that would take a couple of days to upload after I prepare the vhd for upload to Azure and I am trying to avoid this

Answer 1

It isn't recommended to backup / restore a domain controller when multiple are involved. Better option is to stand up new ones in the new space. Other than that I'd check that the ports are flowing between networks.
https://learn.microsoft.com/en-us/troubleshoot/windows-server/identity/config-firewall-for-ad-domains-and-trusts#windows-server-2008-and-later-versions
https://www.microsoft.com/en-us/download/details.aspx?id=24009

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