Hi @michelle rightnour ,
if the stored Bitlocker Recovery Key in your Microsoft Account doesn't work the only options are:
- Maybe you have printed the Bitlocker Recovery Key.
- Maybe you have stored the Bitlocker Recovery Key on an USB stick/somewhere else.
If the Bitlocker Recovery Key isn't available anymore you can't decrypt the disk.
Source: Finding your BitLocker recovery key in Windows
(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)
Regards
Andreas Baumgarten