You better know. No, you MUST know what is running on your network lest Autodesk License Compliance come knocking and find something you weren't expecting. If you haven't already, I would highly recommend you run a tool they have that will scan your entire network and report back to you only what is there.
Behold the Autodesk Inventory Advisor
When you download the zip file, it has 2 files inside it - the installer and a quick start guide which also contains the unlock code to use the software.
Using the tool will require network administrator privileges so you will likely need to shack up with IT to run this, unless you are the IT dept. too.
You have a couple options to scan the network - importing your Active Directory or scanning by IP range were the 2 we looked at. We went with the IP range option as it would be more complete.
Once finished scanning you will get a full report of every Autodesk software across your entire organization with options to export to different types of formats. Here is an example of what you might find.
Don't wait - go make sure your Autodesk license usage is compliant!