Scenario: You want to perform an NSLookup in PowerShell so you can use the multiple IP addresses that you are using for DNS Round Robin in another PowerShell Query.
Solution: Run the following:
#Collect the IP Addresses of the hostname into a variable $address = [system.net.dns]::GetHostAddresses("mail.domain.com" | Select IPAddressToString) #For Each Loop it with a command $address | Select -expandproperty IPAddressToString | %{ Get-ADComputer $_ }