BitLocker Recovery Keys

https://myaccount.microsoft.com/device-list (This is private to you and no one else can view these, apart from IT.)

You will then see a list of devices linked to your account, to see the BitLocker Recover Keys for a certain device, select the "View BitLocker Keys" button.

Once you have selected this, you will see the available recovery keys listed by its Key ID, if you have multiple entries here you will need to match the Key ID on the device screen to make sure you enter the correct linked recovery keys. 

Once you know which is the correct Key ID, select the "Show recovery key" button.

Once you select this button, you will see the linked recovery key. 

Your BitLocker recovery key is a unique 48-digit numerical password that can be used to unlock your system.