In June of 2019 Microsoft added to OneDrive the new function Our Team Vault that lets you lock your files in the cloud. Initially or new service was only available on Australia, New Zealand and Canada.
Microsoft has announced its service worldwide October of 2019.
The new service offers a protected area in OneDrive that you can only access by some method control ID or with a second step of authentication, such as your fingerprint, a PIN, or a code sent to you via email or SMS.
Your locked files in Personal Vault have an extra level of security, keeping you safe when someone accesses your account or your device. The Personal Vault appears as a special folder in your account.
On Windows 10 devices, Microsoft uses BitLocker to encrypt the files stored in the Personal Vault. The contents of the Personal Vault are encrypted while uploading to Microsoft servers.
Personal Vault is a free unlimited feature for Office 365 subscribers. Users of OneDrive who do not have a subscription will be able to save up to three files in the protected folder.
If you do not have an Office 365 Home or Personal subscription, however, you can put more than 3 files in a ZIP file and upload them to the Personal Vault to bypass the restriction.
OneDrive's Personal Vault is enabled by default. If you do not intend to use it and want to get rid of it, you can turn it off by following these steps:
Note: The answeractivation of Personal Vault will delete all the files you have saved in the Personal Vault folder and there is no way to recover them.
To disable the OneDrive Personal Vault,
Open the OneDrive Web site and sign in to the service with your account.
Click on icon with the settings gear to open the settings
Click on the "Options" link under "Settings"
In the Options, click the Personal Vault tab on the left and click Verify your identity on the right.
Verify your account with one of the available OneDrive methods.
Finally, click Disable.
You can reactivate it at any time by following the same path as mentioned above and with a click on the Enable Personal Vault.