Identify authorized DHCP Servers using Powershell (one-liners)

Last week, I needed to quickly find out all the Authorized DHCP Servers in the AD Forest. Fortunately, the following Powershell cmdlet saved me a lot of time and I wanted to share it with you.

First of all, you need to make sure that the following module is loaded in order to use the cmdlet that meets our needs.

# Check if the ActiveDirectory module is Loaded
Get-Module -Name ActiveDirectory

# Check if the ActiveDirectory module is available
Get-Module -Name ActiveDirectory -ListAvailable

# Import the ActiveDirectory module if it is not loaded
Import-Module -Name ActiveDirectory

Query AD for Authorized DHCP Servers, make sure you use the forest tree root domain.

Get-ADObject -SearchBase "cn=configuration,dc=contoso,dc=com" -Filter 
"objectclass -eq 'dhcpclass' -AND Name -ne 'dhcproot'" | select name

In case you want to export the results into a text file use the following syntax.

Get-ADObject -SearchBase "cn=configuration,dc=contoso,dc=com" -Filter 
"objectclass -eq 'dhcpclass' -AND Name -ne 'dhcproot'" | select name | Out-File c:\typeyourpathhere

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