From the Autodesk App Store:
Do you use a borrowed network license and want to prevent the “License Borrowed” message from showing up every single time you start Autodesk® AutoCAD®?
[The license on this machine has been borrowed from a license server. You can continue to use this product during the borrow period without a connection to the license server. The borrow period for this license expires on: … To access the product again after the license expires, you must reconnect to a license…