How to Get IP Addresses of Computers In Active Directory Domain
Solution 1:
The DNS Manager should have a list of computer names and what IP address they have been assigned.
Solution 2:
Through ADUC, I'm not sure you can get an IP from a hostname. You could look in the DHCP snap-in (if that's whats handing out addresses), check the DNS manager on the server or use a tool like Angy IP Scanner
Solution 3:
How to use PowerShell to Get the IP Address from the Computer object in AD.
$ComputerName = "Computer01"
(Get-ADComputer $ComputerName -Properties IPv4Address).IPv4Address