Hi @Corbin Orth
To help with your query You create a passive file screen to achieve this. Passive file screen enforcement allows the user to save the file, but notifies the user that the file is not an authorized file. You can also configure a file screen to run a command or script when a user tries to save an unauthorized file.
Kindly check the link below for additional instructions and guidance.
File Screening Management Scenarios
http://technet.microsoft.com/en-us/library/cc755013(v=ws.10).aspx
Screening Files
http://technet.microsoft.com/en-us/library/cc732349(v=ws.10).aspx
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