Use a physical USB security key
A small USB security key that you can order from your IT supplier requires neither a phone nor Bluetooth.
Note: The procedure may vary slightly. Follow Microsoft's instructions on your screen.
When Microsoft eventually asks you to create a Passkey
Pressure Next (1)
In the window where you are asked to choose where to save the passkey, you select Security key (2)
Insert the security key into a USB port on the computer when prompted by Windows.
Confirm by pressing the metal contact of the key when prompted by Windows.
The first time you use the key, you must create a PIN code (3). You will need to use that in the future, every time the key is used.
The passkey is ready. At the next login, you select Use a Passkey, plug the USB security key into the computer, and confirm using the key's button and your PIN.
No security key yet? Contact IT support and order one. It is a one-time purchase and works across all your computers.
English 
Dansk