Note: If the specific error code is not listed in the main article, search the Autodesk site for "Error [-85440]" specifically, as it usually points to the license file being unreadable or the vendor daemon being down.
Before troubleshooting the local machine, ensure the server is active: 12 Solutions to Fix AutoCAD License Manager Not Functioning autodesk network license not available error 85440 link
This is the most common fix. If your account is set for "Sign In" (Single-user) but the software is trying to find a "Multi-user" (Network) server, it will fail. For 2020 and newer versions: Open your software and look for the Let's Get Started If you can't reach it, use the Autodesk Licensing Support Tool to reset the license. "Single-user" instead of Network/Multi-user. 2. Update the Network License Manager (LMTOOLS) Note: If the specific error code is not