|If for whatever reason, the previous IT person who setup the IP's didn't record such vital information(?!) at least you could match it to a person and office.|
If I might make a suggestion.....
Do audit all computers/laptops within your network. Do so by opening a command prompt window and doing the following command:
Copy the output of that into a file that has for it's filename, the hostname of the PC/laptop the information came off of. Save all files in a folder on the network. The output of this command will contain, hostname, IP, MAC, user etc.
People get fired, quit, retire. Over the course of a couple years, you could have any number of different users using the same PC do to the aforementioned happenings. If you save the info by hostname of PC, that won't change until the PC does. When a PC/laptop is decommissioned, you simply delete the file. As you build new ones to be deployed, you create the file. It's just your original audit that's going to be time consuming. Once done, upkeep is minimal.
We use a simple hostname nomenclature where I work. It is as follows:
Year of deployment (last 2 digits) D or L (designates desktop or laptop) 4 digit number which is unique.
For example, my PC just got evergreened this year. My old one was:
My new one is:
Our department laptop is: