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Troubleshooting

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$dc = 'DC01', 'DC02', 'DC03'

$dc | ForEach-Object -Process {
  write-host $_ -ForegroundColor Yellow
  nltest.exe /QUERY 
}

## Force out of schedule replication
$dc | ForEach-Object -Process {
  write-host $_ -ForegroundColor Yellow
  repadmin /syncall /force /APed
}

## Update DFSR state
$dc | ForEach-Object -Process {
  Update-DfsrConfigurationFromAD -ComputerName $_ -Verbose
}

$dc | ForEach-Object -Process {
  write-host $_ -ForegroundColor Yellow
  repadmin /replsum
}

$dc | ForEach-Object -Process {
  write-host $_ -ForegroundColor Yellow
  dcdiag /e /c /q
}

$dc | ForEach-Object -Process {
  write-host $_ -ForegroundColor Yellow
  dcdiag /e /test:sysvolcheck /test:advertising
}

$dc | ForEach-Object -Process {
  write-host $_ -ForegroundColor Yellow
  Invoke-Command -ComputerName $_ -ScriptBlock {
    nltest.exe /DCLIST:domain.local
  } 
}
$dc | ForEach-Object -Process {
  write-host $_ -ForegroundColor Yellow
  Invoke-Command -ComputerName $_ -ScriptBlock {
    nltest.exe /DSREGDNS 
  } 
}
$dc | ForEach-Object -Process {
  Invoke-Command -ComputerName $_ -ScriptBlock {
    nltest.exe /DSQUERYDNS 
  } 
}
$dc | ForEach-Object -Process {
  write-host $_ -ForegroundColor Yellow
  Invoke-Command -ComputerName $_ -ScriptBlock {
    repadmin /syncall 
  } 
}

$dc | ForEach-Object -Process {
  write-host $_ -ForegroundColor Yellow
  Invoke-Command -ComputerName $_ -ScriptBlock {
    repadmin /showrepl
  } 
}

Clear-Host
$dc | ForEach-Object -Process {
  write-host $_ -ForegroundColor Yellow
  Invoke-Command -ComputerName $_ -ScriptBlock {
    dcdiag /fix
  } 
}

Clear-Host
$dc | ForEach-Object -Process {
  write-host $_ -ForegroundColor Yellow
  Invoke-Command -ComputerName $_ -ScriptBlock {
    wevtutil el | Foreach-Object {wevtutil cl "$_"}
  } 
}

### Enable Strict Replication Consistency
$dc | ForEach-Object -Process {
  Invoke-Command -ComputerName $_ -ScriptBlock {
    New-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Services\NTDS\Parameters' -Name 'Strict Replication Consistency' -Value '1' -PropertyType DWORD -Force 
  } 
}

### Disable Strict Replication Consistency
$dc | ForEach-Object -Process {
  Invoke-Command -ComputerName $_ -ScriptBlock {
    New-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Services\NTDS\Parameters' -Name 'Strict Replication Consistency' -Value '0' -PropertyType DWORD -Force 
  } 
}

### Enable inbound replication on the domain controller when lingering objects exist
$dc | ForEach-Object -Process {
  Invoke-Command -ComputerName $_ -ScriptBlock {
    New-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Services\NTDS\Parameters' -Name 'Allow Replication With Divergent and Corrupt Partner' -Value '1' -PropertyType DWORD -Force 
  } 
}

### Disable inbound replication on the domain controller when lingering objects exist
$dc | ForEach-Object -Process {
  Invoke-Command -ComputerName $_ -ScriptBlock {
    New-ItemProperty -Path 'HKLM:\SYSTEM\CurrentControlSet\Services\NTDS\Parameters' -Name 'Allow Replication With Divergent and Corrupt Partner' -Value '0' -PropertyType DWORD -Force 
  } 
}

### Search by Event ID
$dc | ForEach-Object -Process {
  Invoke-Command -ComputerName $_ -ScriptBlock {
    Get-EventLog -logname 'Directory Service' | ?{ ($_.eventid -eq "1388") -or ($_.eventid -eq "1988") -or ($_.eventid -eq "2042") }
  } 
}