Serial numbers are typically tied to perpetual licenses purchased in the past. Modern subscriptions often use a "sign-in" activation method rather than a serial number.
Look at the top right corner and click the drop-down arrow next to the (question mark) icon. Select About AutoCAD Electrical . autodesk autocad electrical 2020 serial number
Once you have obtained a serial number, you can activate Autodesk AutoCAD Electrical 2020 by following these steps: Serial numbers are typically tied to perpetual licenses
Some users with legitimate perpetual licenses have reported getting stuck in an activation loop where activation appears successful but then returns to the license warning screen. Solutions include: autodesk autocad electrical 2020 serial number