Can't save BitLocker key to Microsoft Account in Windows 10 when encrypting an external drive

1. Save the key to a file (can throw it away later).
2. Start encrypting the drive.
3. Run a command prompt with Admin rights.
4. You need to get the volume ID by typing "mountvol".
5. Now run the "bitlockerwizardelev.exe": "%SystemRoot%\System32\BitLockerWizardElev.exe" \\?\Volume{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxx}\ Y.
6. It will prompt the BitLocker GUI as Admin and save the key to your account.