BitLocker is a Microsoft encryption product that is designed to protect user data on a computer. If a problem with BitLocker occurs, you encounter a prompt for a BitLocker recovery key. If you do not have a working recovery key for the BitLocker prompt, you are unable to access the computer.
A BIOS update can trigger a BitLocker Recovery event as the PCR banks between the time Windows runs, and the time the BIOS is flashed, changes. However, all Dell BIOS updates suspend BitLocker before the flash so a BitLocker Recovery event cannot occur as a result of updating the firmware. If the computer goes into recovery mode, it is likely due to an external drive being connected as it changes the boot drive enumeration. Users can configure this in the BIOS. Outside of this specific scenario, there is not an event that triggers BitLocker encryption unexpectedly. The BitLocker encryption process happens in the background and often goes unnoticed by users until a Recovery event occurs.
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The BitLocker setup process enforces the creation of a recovery key at the time of activation. If you are unable to locate a required BitLocker recovery key and are unable to revert a configuration change that might have caused it to be required, you must reset your device using one of the Windows 10 recovery options. Resetting your device removes all your files.
As part of the BitLocker recovery process, it's recommended to determine what caused a device to enter in recovery mode. Root cause analysis might help to prevent the problem from occurring again in the future. For instance, if you determine that an attacker modified a device by obtaining physical access, you can implement new security policies for tracking who has physical presence.
For planned scenarios, such as a known hardware or firmware upgrades, initiating recovery can be avoided by temporarily suspending BitLocker protection. Suspending BitLocker leaves the drive fully encrypted, and the administrator can quickly resume BitLocker protection after the planned task is completed. Using suspend and resume also reseals the encryption key without requiring the entry of the recovery key.
Recovery is described within the context of unplanned or undesired behavior. However, recovery can also be caused as an intended production scenario, for example in order to manage access control. When devices are redeployed to other departments or employees in the organization, BitLocker can be forced into recovery before the device is delivered to a new user.
Both the Recovery password and Recovery key can be supplied by users in the Control Panel applet (for data and removable drives), or in the preboot recovery screen. It's recommended to configure policy settings to customize the preboot recovery screen, for example by adding a custom message, URL, and help desk contact information. For more information, review the article BitLocker preboot recovery screen.
Answering the questions helps to determine the best BitLocker recovery process for the organization, and to configure BitLocker policy settings accordingly. For example, if the organization has a process for resetting passwords, a similar process can be used for BitLocker recovery. If users aren't allowed to save or retrieve recovery information, the organization can use a data recovery agents (DRAs), or automatically back up recovery information.
In each of these policies, select Save BitLocker recovery information to Active Directory Domain Services and then choose which BitLocker recovery information to store in AD DS. Use the option Do not enable BitLocker until recovery information is stored in AD DS to prevent users from enabling BitLocker unless the backup of BitLocker recovery information for the drive to Microsoft Entra ID or AD DS succeeds.
To recover BitLocker, a user can use a recovery password, if available. The BitLocker recovery password is unique to the device it was created on, and can be saved in different ways. Depending on the configured policy settings, the recovery password can be:
Having access to the recovery password allows the holder to unlock a BitLocker-protected volume and access all of its data. Therefore, it's important for your organization to establish procedures to control access to recovery passwords and ensure that they're stored securely, separate from the devices they protect.
There's an option for storing the BitLocker recovery key in a user's Microsoft account. The option is available for devices that aren't members of a domain and that the user is using a Microsoft account. Storing the recovery password in a Microsoft account is the default recommended recovery key storage method for devices that aren't Microsoft Entra joined or Active Directory joined.
Backup of the recovery password should be configured before BitLocker is enabled, but can also be done after encryption, as described in the BitLocker operations guide.
The preferred backup methodology in an organization is to automatically store BitLocker recovery information in a central location. Depending on the organization's requirements, the recovery information can be stored in Microsoft Entra ID, AD DS, or file shares.
There's no automatic way to store the recovery key for removable storage devices in Microsoft Entra ID or AD DS. However, you can use PowerShell or the manage.bde.exe command to do so. For more information and examples, review the BitLocker operations guide.
DRAs can be used to recover OS drives, fixed data drives, and removable data drives. However, when used to recover OS drives, the operating system drive must be mounted on another device as a data drive for the DRA to be able to unlock the drive. Data recovery agents are added to the drive when it's encrypted, and can be updated after encryption occurs.
The benefit of using a DRA over password or key recovery is that the DRA acts as a master key for BitLocker. With a DRA you can recover any volume protected by the policy, without having to find a specific password or key for each individual volume.
The BitLocker recovery information for Microsoft Entra joined devices can be stored in Microsoft Entra ID. The advantage of storing the BitLocker recovery passwords in Microsoft Entra ID, is that users can easily retrieve the passwords for the devices assigned to them from the web, without involving the help desk.
The BitLocker recovery password information stored in Microsoft Entra ID is a bitlockerRecoveryKey resource type. The resource can be retrieved from the Microsoft Entra admin center, the Microsoft Intune admin center (for devices enrolled in Microsoft Intune), using PowerShell, or using Microsoft Graph. For more information, see bitlockerRecoveryKey resource type.
The BitLocker recovery information for a device joined to an Active Directory domain can be stored in AD DS. The information is stored in a child object of the computer object itself. Each BitLocker recovery object includes the recovery password and other recovery information. More than one BitLocker recovery object can exist under each computer object, because there can be more than one recovery password associated with a BitLocker-enabled volume.
The BitLocker key package isn't saved by default. To save the package along with the recovery password in AD DS, the Backup recovery password and key package policy setting must be selected in the policy that controls the recovery method. The key package can also be exported from a working volume.
BitLocker likely ensured that a recovery key was safely backed up prior to activating protection. There are several places that your recovery key may be, depending on the choice that was made when activating BitLocker:
In a work or school account: If your device was ever signed into an organization using a work or school email account, your recovery key may be stored in that organization's Azure AD account. You may be able to access it directly or you may need to contact the IT support for that organization to access your recovery key.
Your BitLocker recovery key is a unique 48-digit numerical password that can be used to unlock your system if BitLocker is otherwise unable to confirm for certain that the attempt to access the system drive is authorized.
Windows will require a BitLocker recovery key when it detects a possible unauthorized attempt to access the data. This extra step is a security precaution intended to keep your data safe and secure. This can also happen if you make changes in hardware, firmware, or software which BitLocker cannot distinguish from a possible attack. In these cases, BitLocker may require the extra security of the recovery key even if the user is an authorized owner of the device. This is to be certain that the person trying to unlock the data really is authorized.
Your device is a modern device that meets certain requirements to automatically enable device encryption: In this case your BitLocker recovery key is automatically saved to your Microsoft account before protection is activated.
A work or school organization that is managing your device (currently or in the past) activated BitLocker protection on your device: In this case the organization may have your BitLocker recovery key.
According to the official Microsoft definition, your BitLocker recovery key is a unique 48-digit numerical password that can be used to unlock your system if BitLocker is otherwise unable to confirm for certain that the attempt to access the system drive is authorized.
In other words, it is a password. A long and somewhat complicated password that you will not want to try and commit to memory. This recovery key is issued at the time of BitLocker installation in the event that the user forgets or misplaces their password and loses access to their hard drive.
Your BitLocker recovery key is vital, especially if you need to access your encrypted information urgently. You might not be able to retrieve your data or even start your device without the recovery key, which can result in permanent data loss. Fortunately, finding your BitLocker recovery key is rather simple if you can access the right resources and knowledge. be457b7860
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