Tuesday, February 10, 2015

How to count the number of DC's in your forest and individual domains with PowerShell

For some reason, with all the power of the internets, this answer was nowhere to be easily found.

I needed to be able to count the number of (Domain Controllers) DC's in our forest, and also for a specific domain. It's a simple PowerShell script ... here is what I used



cls

$domains = (Get-ADForest).Domains;

foreach ($domain in $domains)

{

    Write-Host $domain
    (Get-ADDomain -Identity $domain | select -ExpandProperty ReplicaDirectoryServers).Count;
    Write-Host "";
    $totalCount = $totalCount + (Get-ADDomain -Identity $domain | select -ExpandProperty ReplicaDirectoryServers).Count;
}

Write-Host "Total domain controller count is: "$totalCount

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