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It’s sometimes interesting to know how old your AD forest is and when the various domains were created.  I recently came across a really useful TechNet Blog with a Powershell snippet to do just this.  My version shown below just has some slightly different formatting.

# How old is the forest?
Get-ADObject -SearchBase (Get-ADForest).PartitionsContainer `
-LDAPFilter "(&(objectClass=crossRef)(systemFlags=3))" `
-pr dnsRoot, nETBIOSName, whenCreated | Sort whenCreated `
| select @{e={($_.DNSRoot)};l=”DomainFQDN”}, `
nETBIOSName, @{e={(get-date $_.whencreated -format dd/MM/yyyy)};l=”whenCreated”} `
| ft -AutoSize

The output should look something like this:

check-forestage

So how old is your forest?

2 Comments

  1. DrWellyKen says:

    Works great for me

    Thank Tony :)

  2. RaFi says:

    My oldest AD: 28-03-2001

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