1) Install Autodesk Windows 64bit Application.     
   
2) Install network license manager "NLM_2020_x64_setup.msi" (version 11.16.2).
   
3) Copy cracked FlexLM vendor daemon "adskflex.exe" from "xf-adsk2020-netcrk-win.7z" into network license manager location (Default = C:\Autodesk\Network License Manager\) and overwrite existing file.

4) Copy cracked "adlmint.dll" from "xf-adsk2020-netcrk-win.7z" in each licensing agent folder, usually in "C:\Program Files (x86)\Common Files\Autodesk Shared\AdskLicensing\X.X.X.XXXX\AdskLicensingAgent"
   Example "C:\Program Files (x86)\Common Files\Autodesk Shared\AdskLicensing\10.1.0.3194\AdskLicensingAgent" for Autocad 2021. Overwrite old file.

5) Edit adesk.lic and change HOSTNAME and MAC at the top to suit your configuration. If you are not sure start LMTOOLS Utility and go to 
   System Settings, your HOSTNAME = Computer/Hostname and MAC = Ethernet. Example MAC address = f46b8d8ccba9
   You can change vendor port too and add your previous licenses of course :)
   Save the file where you want

6) Start LMTOOLS Utility (lmtools.exe GUI)
   - in 'config services', add a "Autodesk' service name
                           choose C:\Autodesk\Autodesk Network License Manager\lmgrd.exe for path to lmgrd
                           choose X:\path\where\you\saved\adesk.lic for path to license file
                           choose a empty file to have debug logs (optional)
                           tick 'start server at power up' and 'use services'
                           Click Save
   - in 'service/license file' choose configuration using services and tick 'ignore license file path env var" (dont click that if you 
                               you wanna use a ditributed licensing .. or you will have to edit or create a Licpath.lic file)                 
   - in 'start/stop/read' click 'start server'
                          click 'rereadlicense file'
   - in 'server status' click 'perform status enquiry'   
                        check that you have 'adskflex: UP v11.16.2'
                        check features are activated : Users of 87399ACAD_E_2021_0F:  (Total of 100 licenses issued;  Total of 0 licenses in use) for example
   - in 'server diags' check all featured can be checked out 
   - check logs also win 'config services' if you configured it

7) Start app & select "Use a network license". If asked use 2080@127.0.0.1 as a server name.