I know this may seem like overkill, but can I use BoxCryptor to store and retrieve files from a OneDrive Personal Vault? Personal Vault is encrypted by Bitlocker so this would entail double encryption and decryption.
DavidR Unfortunately, Boxcryptor does not support OneDrive Vault due to technical restrictions by Microsoft. We wrote down some information about OneDrive Vault in our blog: https://www.boxcryptor.com/en/blog/post/onedrive-personal-vault-security/