question

I'm guessing that the data you export doesn't have the properties you expected? See if this works better:

 $DomainName = (Get-ADDomain).DNSRoot
 (Get-ADDomainController -Filter * -Server $DomainName).HostName |
     ForEach-Object{
         $DC = $_
         Try{
             Get-Winevent -FilterHashtable @{Logname='System';ID=5829,5830} -MaxEvents 1 -ComputerName $DC |
                 Select-Object MachineName,ID,TimeCreated,Message | 
                     Export-Csv 529.csv -NTI
         }
         Catch{
             $Err = $_ | Out-String
             Add-Content "$DC $Err " -path c:\temp\UnreachableDCs.txt
         }
     }

Note that this will only get the Domain Controllers in your domain and not the entire forest. If you have a multi-domain forest you can certainly get the list of domains in the forest and for each domain get the names of all the domain controllers in each domain.

Hi,

The EventLogRecord objects got by Get-WinEvent have no "EventID" and "TimeWritten" properties. You can select the properties "Id" and "TimeCreated" instead.
https://docs.microsoft.com/en-us/dotnet/api/system.diagnostics.eventing.reader.eventlogrecord

Best Regards,
Ian Xue
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