It looks like you’re asking about a file named Adsknlm.exe in the context of AutoCAD 2023.

If you are using a standalone (perpetual) license or a subscription (named user) license, Adsknlm.exe should not be running on your local machine. Its presence only makes sense in a network server environment or if you have previously installed network license manager tools.

Navigate to C:\Program Files (x86)\Common Files\Autodesk Shared\AdskLicensing. Run uninstall.exe as an administrator.