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96
windows/security/operating-system-security/data-protection/bitlocker/_bitlocker-group-policy-settings.md
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@ -35,102 +35,6 @@ If this policy setting isn't enabled, the following options in the **Require add
- Configure TPM startup key and PIN: Required and Allowed
- Configure use of passwords for operating system drives
### Configure the pre-boot recovery message and URL
This policy setting is used to configure the entire recovery message and to replace the existing URL that is displayed on the pre-boot recovery screen when the operating system drive is locked.
| Item | Info |
|:---|:---|
|**Policy description**|With this policy setting, it can be configured the BitLocker recovery screen to display a customized message and URL.|
|**Introduced**|Windows|
|**Drive type**|Operating system drives|
|**Policy path**|*Computer Configuration* > *Administrative Templates* > *Windows Components* > *BitLocker Drive Encryption* > *Operating System Drives* > *Configure pre-boot recovery message and URL*|
|**Conflicts**|None|
|**When enabled**|The customized message and URL are displayed on the pre-boot recovery screen. If a custom recovery message and URL has been previously enabled and the message and URL need to be reverted back to the default message and URL, the policy setting must be enabled and the **Use default recovery message and URL** option selected.|
|**When disabled or not configured**|If the setting hasn't been previously enabled, then the default pre-boot recovery screen is displayed for BitLocker recovery. If the setting previously was enabled and is later disabled, then the last message in Boot Configuration Data (BCD) is displayed whether it was the default recovery message or the custom message.|
#### Reference: Configure the pre-boot recovery message and URL
Enabling the **Configure the pre-boot recovery message and URL** policy setting allows customization of the default recovery screen message and URL to assist customers in recovering their key.
Once the setting is enabled, three options are available:
- If the **Use default recovery message and URL** option is selected, the default BitLocker recovery message and URL will be displayed on the pre-boot recovery screen.
- If the **Use custom recovery message** option is selected, enter the custom message in the **Custom recovery message option** text box. The message that is entered in the **Custom recovery message option** text box is displayed on the pre-boot recovery screen. If a recovery URL is available, include it in the message.
- If the **Use custom recovery URL** option is selected, enter the custom message URL in the **Custom recovery URL option** text box. The URL that is entered in the **Custom recovery URL option** text box replaces the default URL in the default recovery message, which is displayed on the pre-boot recovery screen.
> [!IMPORTANT]
> Not all characters and languages are supported in the pre-boot environment. It is strongly recommended to verify the correct appearance of the characters that are used for the custom message and URL on the pre-boot recovery screen.
> [!IMPORTANT]
> Because BCDEdit commands can be altered manually before Group Policy settings have been set, the policy setting can't be returned to the default setting by selecting the **Not Configured** option after this policy setting has been configured. To return to the default pre-boot recovery screen leave the policy setting enabled and select the **Use default message** options from the **Choose an option for the pre-boot recovery message** drop-down list box.
### Allow Secure Boot for integrity validation
This policy controls how BitLocker-enabled system volumes are handled with the Secure Boot feature. Enabling this feature forces Secure Boot validation during the boot process and verifies Boot Configuration Data (BCD) settings according to the Secure Boot policy.
| Item | Info |
|:---|:---|
|**Policy description**|With this policy setting, it can be configured whether Secure Boot will be allowed as the platform integrity provider for BitLocker operating system drives.|
|**Drive type**|All drives|
|**Policy path**|*Computer Configuration* > *Administrative Templates* > *Windows Components* > *BitLocker Drive Encryption* > *Operating System Drives*|
|**Conflicts**|If **Allow Secure Boot for integrity validation** is enabled, make sure the Configure TPM platform validation profile for native UEFI firmware configurations Group Policy setting isn't enabled, or include PCR 7 to allow BitLocker to use Secure Boot for platform or BCD integrity validation. <BR><BR> For more information about PCR 7, see [About the Platform Configuration Register (PCR)](#about-the-platform-configuration-register-pcr) in this article.|
|**When enabled or not configured**|BitLocker uses Secure Boot for platform integrity if the platform is capable of Secure Boot-based integrity validation.|
|**When disabled**|BitLocker uses legacy platform integrity validation, even on systems that are capable of Secure Boot-based integrity validation.|
#### Reference: Allow Secure Boot for integrity validation
Secure boot ensures that the computer's pre-boot environment loads only firmware that is digitally signed by authorized software publishers.
When this policy is enabled and the hardware is capable of using secure boot for BitLocker scenarios, the **Use enhanced Boot Configuration Data validation profile** group policy setting is ignored, and secure boot verifies BCD settings according to the secure boot policy setting, which is configured separately from BitLocker.
> [!WARNING]
> Disabling this policy might result in BitLocker recovery when manufacturer-specific firmware is updated. If this policy is disabled, suspend BitLocker prior to applying firmware updates.
### Provide the unique identifiers for your organization
This policy setting is used to establish an identifier that is applied to all drives that are encrypted in an organization.
| Item | Info |
|:---|:---|
|**Policy description**|With this policy setting, unique organizational identifiers can be associated to a new drive that is enabled with BitLocker.|
|**Conflicts**|Identification fields are required to manage certificate-based data recovery agents on BitLocker-protected drives. BitLocker manages and updates certificate-based data recovery agents only when the identification field is present on a drive and it's identical to the value that is configured on the computer.|
|**When enabled**|The identification field on the BitLocker-protected drive and any allowed identification field that is used by an organization can be configured.|
#### Reference: Provide the unique identifiers for your organization
These identifiers are stored as the identification field and the allowed identification field. The identification field allows association of a unique organizational identifier to BitLocker-protected drives. This identifier is automatically added to new BitLocker-protected drives, and it can be updated on existing BitLocker-protected drives by using the [Manage-bde](/windows-server/administration/windows-commands/manage-bde) command-line tool.
An identification field is required to manage certificate-based data recovery agents on BitLocker-protected drives and for potential updates to the BitLocker To Go Reader. BitLocker manages and updates data recovery agents only when the identification field on the drive matches the value that is configured in the identification field. In a similar manner, BitLocker updates the BitLocker To Go Reader only when the identification field's value on the drive matches the value that is configured for the identification field.
For more information about the tool to manage BitLocker, see [Manage-bde](/windows-server/administration/windows-commands/manage-bde).
The allowed identification field is used in combination with the **Deny write access to removable drives not protected by BitLocker** policy setting to help control the use of removable drives in an organization. It's a comma-separated list of identification fields from an internal organization or external organizations.
The identification fields on existing drives can be configured by using the [Manage-bde](/windows-server/administration/windows-commands/manage-bde) command-line tool.
When a BitLocker-protected drive is mounted on another BitLocker-enabled computer, the identification field and the allowed identification field are used to determine whether the drive is from an external organization.
Multiple values separated by commas can be entered in the identification and allowed identification fields. The identification field can be any value upto 260 characters.
### Prevent memory overwrite on restart
This policy setting is used to control whether the computer's memory will be overwritten the next time the computer is restarted.
| Item | Info |
|:---|:---|
|**Policy description**|With this policy setting, it can be controlled computer restart performance at the risk of exposing BitLocker secrets.|
|**Introduced**|Windows Vista|
|**Drive type**|All drives|
|**Policy path**|*Computer Configuration* > *Administrative Templates* > *Windows Components* > *BitLocker Drive Encryption*|
|**Conflicts**|None|
|**When enabled**|The computer won't overwrite memory when it restarts. Preventing memory overwrite may improve restart performance, but it increases the risk of exposing BitLocker secrets.|
|**When disabled or not configured**|BitLocker secrets are removed from memory when the computer restarts.|
#### Reference: Prevent memory overwrite on restart
This policy setting is applied when BitLocker is turned on. BitLocker secrets include key material that is used to encrypt data. This policy setting applies only when BitLocker protection is enabled.
### Configure TPM platform validation profile for BIOS-based firmware configurations
This policy setting determines what values the TPM measures when it validates early boot components before it unlocks an operating system drive on a computer with a BIOS configuration or with UEFI firmware that has the Compatibility Support Module (CSM) enabled.

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windows/security/operating-system-security/data-protection/bitlocker/bitlocker-basic-deployment.md
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@ -27,7 +27,7 @@ BitLocker encryption can be enabled and managed using the following methods:
### Encrypting volumes using the BitLocker control panel
Encrypting volumes with the BitLocker control panel (select **Start**, enter `Bitlocker`, select **Manage BitLocker**) is how many users will use BitLocker. The name of the BitLocker control panel is BitLocker Drive Encryption. The BitLocker control panel supports encrypting operating system, fixed data, and removable data volumes. The BitLocker control panel will organize available drives in the appropriate category based on how the device reports itself to Windows. Only formatted volumes with assigned drive letters will appear properly in the BitLocker control panel applet.
Encrypting volumes with the BitLocker control panel (select **Start**, enter `BitLocker`, select **Manage BitLocker**) is how many users will use BitLocker. The name of the BitLocker control panel is BitLocker Drive Encryption. The BitLocker control panel supports encrypting operating system, fixed data, and removable data volumes. The BitLocker control panel will organize available drives in the appropriate category based on how the device reports itself to Windows. Only formatted volumes with assigned drive letters will appear properly in the BitLocker control panel applet.
To start encryption for a volume, select **Turn on BitLocker** for the appropriate drive to initialize the **BitLocker Drive Encryption Wizard**. **BitLocker Drive Encryption Wizard** options vary based on volume type (operating system volume or data volume).

2
windows/security/operating-system-security/data-protection/bitlocker/bitlocker-device-encryption-overview-windows-10.md → windows/security/operating-system-security/data-protection/bitlocker/bitlocker-device-encryption.md
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@ -1,5 +1,5 @@
---
title: Overview of BitLocker Device Encryption in Windows
title: Overview of BitLocker Device Encryption
description: This article provides an overview of how BitLocker Device Encryption can help protect data on devices running Windows.
ms.collection:
- highpri

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windows/security/operating-system-security/data-protection/bitlocker/includes/allow-secure-boot-for-integrity-validation.md
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@ -7,7 +7,20 @@ ms.topic: include
### Allow Secure Boot for integrity validation
This policy setting allows you to configure whether Secure Boot will be allowed as the platform integrity provider for BitLocker operating system drives. Secure Boot ensures that the PC's pre-boot environment only loads firmware that is digitally signed by authorized software publishers. Secure Boot also provides more flexibility for managing pre-boot configuration than legacy BitLocker integrity checks. If you enable or do not configure this policy setting, BitLocker will use Secure Boot for platform integrity if the platform is capable of Secure Boot-based integrity validation. If you disable this policy setting, BitLocker will use legacy platform integrity validation, even on systems capable of Secure Boot-based integrity validation. When this policy is enabled and the hardware is capable of using Secure Boot for BitLocker scenarios, the "Use enhanced Boot Configuration Data validation profile" group policy setting is ignored and Secure Boot verifies BCD settings according to the Secure Boot policy setting, which is configured separately from BitLocker. Note: If the group policy setting "Configure TPM platform validation profile for native UEFI firmware configurations" is enabled and has PCR 7 omitted, Bitlocker will be prevented from using Secure Boot for platform or Boot Configuration Data (BCD) integrity validation. Warning: Disabling this policy may result in BitLocker recovery when firmware is updated. If you disable this policy, suspend BitLocker prior to applying firmware updates.
This policy setting allows you to configure whether Secure Boot is allowed as the platform integrity provider for BitLocker operating system drives.
Secure Boot ensures that the device's pre-boot environment only loads firmware that is digitally signed by authorized software publishers.
- If you enable or don't configure this policy setting, BitLocker uses Secure Boot for platform integrity if the platform is capable of Secure Boot-based integrity validation
- If you disable this policy setting, BitLocker will use legacy platform integrity validation, even on systems capable of Secure Boot-based integrity validation
When this policy is enabled and the hardware is capable of using Secure Boot for BitLocker scenarios, the *[Use enhanced Boot Configuration Data validation profile](../policy-settings.md?tabs=os#use-enhanced-boot-configuration-data-validation-profile)* policy setting is ignored and Secure Boot verifies BCD settings according to the Secure Boot policy setting, which is configured separately from BitLocker.
> [!NOTE]
> If the policy setting *[Configure TPM platform validation profile for native UEFI firmware configurations](../policy-settings.md?tabs=os#configure-tpm-platform-validation-profile-for-native-uefi-firmware-configurations)* is enabled and has PCR 7 omitted, BitLocker is prevented from using Secure Boot for platform or Boot Configuration Data (BCD) integrity validation.
> [!WARNING]
> Disabling this policy might result in BitLocker recovery when manufacturer-specific firmware is updated. If this policy is disabled, suspend BitLocker prior to applying firmware updates.
| | Path |
|--|--|

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windows/security/operating-system-security/data-protection/bitlocker/includes/configure-pre-boot-recovery-message-and-url.md
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@ -7,7 +7,14 @@ ms.topic: include
### Configure pre-boot recovery message and URL
This policy setting lets you configure the entire recovery message or replace the existing URL that are displayed on the pre-boot key recovery screen when the OS drive is locked. If you select the "Use default recovery message and URL" option, the default BitLocker recovery message and URL will be displayed in the pre-boot key recovery screen. If you have previously configured a custom recovery message or URL and want to revert to the default message, you must keep the policy enabled and select the "Use default recovery message and URL" option. If you select the "Use custom recovery message" option, the message you type in the "Custom recovery message option" text box will be displayed in the pre-boot key recovery screen. If a recovery URL is available, include it in the message. If you select the "Use custom recovery URL" option, the URL you type in the "Custom recovery URL option" text box will replace the default URL in the default recovery message, which will be displayed in the pre-boot key recovery screen. Note: Not all characters and languages are supported in pre-boot. It is strongly recommended that you test that the characters you use for the custom message or URL appear correctly on the pre-boot recovery screen.
This policy setting is used to configure the recovery message and to replace the existing URL that is displayed on the pre-boot recovery screen when the OS drive is locked.
- If you select the **Use default recovery message and URL** option, the default BitLocker recovery message and URL are displayed in the pre-boot key recovery screen. If you have previously configured a custom recovery message or URL and want to revert to the default message, you must keep the policy enabled and select the **Use default recovery message and URL** option
- If you select the **Use custom recovery message** option, the message you add to the **Custom recovery message option** text box is displayed in the pre-boot key recovery screen. If a recovery URL is available, include it in the message
- If you select the **Use custom recovery URL** option, the URL you add to the **Custom recovery URL option** text box replaces the default URL in the default recovery message, which is displayed in the pre-boot key recovery screen
> [!NOTE]
> Not all characters and languages are supported in pre-boot. It is strongly recommended that you test that the characters you use for the custom message or URL appear correctly on the pre-boot recovery screen.
| | Path |
|--|--|

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windows/security/operating-system-security/data-protection/bitlocker/includes/prevent-memory-overwrite-on-restart.md
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@ -6,7 +6,14 @@ ms.topic: include
---
### Prevent memory overwrite on restart
This policy setting controls computer restart performance at the risk of exposing BitLocker secrets. BitLocker secrets include key material used to encrypt data. This policy setting applies only when BitLocker protection is enabled. If you enable this policy setting, memory will not be overwritten when the computer restarts. Preventing memory overwrite may improve restart performance but will increase the risk of exposing BitLocker secrets. If you disable or do not configure this policy setting, BitLocker secrets are removed from memory when the computer restarts.
This policy setting is used to control whether the computer's memory is overwritten when the device restarts. BitLocker secrets include key material used to encrypt data.
- If you enable this policy setting, memory isn't overwritten when the computer restarts. Preventing memory overwrite may improve restart performance but increases the risk of exposing BitLocker secrets.
- If you disable or do not configure this policy setting, BitLocker secrets are removed from memory when the computer restarts.
> [!NOTE]
> This policy setting applies only when BitLocker protection is enabled.
| | Path |
|--|--|

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windows/security/operating-system-security/data-protection/bitlocker/includes/provide-the-unique-identifiers-for-your-organization.md
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@ -7,7 +7,17 @@ ms.topic: include
### Provide the unique identifiers for your organization
This policy setting allows you to associate unique organizational identifiers to a new drive that is enabled with BitLocker. These identifiers are stored as the identification field and allowed identification field. The identification field allows you to associate a unique organizational identifier to BitLocker-protected drives. This identifier is automatically added to new BitLocker-protected drives and can be updated on existing BitLocker-protected drives using the manage-bde command-line tool. An identification field is required for management of certificate-based data recovery agents on BitLocker-protected drives and for potential updates to the BitLocker To Go Reader. BitLocker will only manage and update data recovery agents when the identification field on the drive matches the value configured in the identification field. In a similar manner, BitLocker will only update the BitLocker To Go Reader when the identification field on the drive matches the value configured for the identification field. The allowed identification field is used in combination with the "Deny write access to removable drives not protected by BitLocker" policy setting to help control the use of removable drives in your organization. It is a comma separated list of identification fields from your organization or other external organizations. You can configure the identification fields on existing drives by using manage-bde.exe. If you enable this policy setting, you can configure the identification field on the BitLocker-protected drive and any allowed identification field used by your organization. When a BitLocker-protected drive is mounted on another BitLocker-enabled computer the identification field and allowed identification field will be used to determine whether the drive is from an outside organization. If you disable or do not configure this policy setting, the identification field is not required. Note: Identification fields are required for management of certificate-based data recovery agents on BitLocker-protected drives. BitLocker will only manage and update certificate-based data recovery agents when the identification field is present on a drive and is identical to the value configured on the computer. The identification field can be any value of 260 characters or fewer.
This policy setting allows you to associate unique organizational identifiers to a drive that is encrypted with BitLocker. The identifiers are stored as the *identification field* and *allowed identification field*:
- The identification field allows you to associate a unique organizational identifier to BitLocker-protected drives. This identifier is automatically added to new BitLocker-protected drives and can be updated on existing BitLocker-protected drives using the *BitLocker Drive Encryption: Configuration Tool* (`manage-bde.exe`)
- The allowed identification field is used in combination with the *[Deny write access to removable drives not protected by BitLocker](../policy-settings.md?tabs=removable##deny-write-access-to-removable-drives-not-protected-by-bitlocker)* policy setting to help control the use of removable drives in your organization. It's a comma separated list of identification fields from your organization or other external organizations. You can configure the identification fields on existing drives by using `manage-bde.exe`.
If you enable this policy setting, you can configure the identification field on the BitLocker-protected drive and any allowed identification field used by your organization. When a BitLocker-protected drive is mounted on another BitLocker-enabled device, the identification field and allowed identification field are used to determine whether the drive is from a different organization.
If you disable or don't configure this policy setting, the identification field is not required.
> [!IMPORTANT]
> Identification fields are required for management of certificate-based data recovery agents on BitLocker-protected drives. BitLocker only manages and updates certificate-based data recovery agents when the identification field is present on a drive and is identical to the value configured on the device. The identification field can be any value of 260 characters or fewer.
| | Path |
|--|--|

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windows/security/operating-system-security/data-protection/bitlocker/includes/use-enhanced-boot-configuration-data-validation-profile.md
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@ -12,7 +12,7 @@ This policy setting determines specific Boot Configuration Data (BCD) settings t
If you don't configure this policy setting, the device will verify the default Windows BCD settings.
> [!NOTE]
> When BitLocker is using Secure Boot for platform and BCD integrity validation, as defined by the *Allow Secure Boot for integrity validation* GPO, this policy setting is ignored. The setting that controls boot debugging `0x16000010` is always validated, and it has no effect if it's included in the inclusion or exclusion list.
> When BitLocker is using Secure Boot for platform and BCD integrity validation, as defined by the *[Allow Secure Boot for integrity validation](../policy-settings.md?tabs=os#allow-secure-boot-for-integrity-validation)* policy setting, this policy setting is ignored. The setting that controls boot debugging `0x16000010` is always validated, and it has no effect if it's included in the inclusion or exclusion list.
| | Path |
|--|--|

2
windows/security/operating-system-security/data-protection/bitlocker/protecting-cluster-shared-volumes-and-storage-area-networks-with-bitlocker.md
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@ -60,7 +60,7 @@ An Active Directory Domain Services (AD DS) protector can also be used for prote
BitLocker encryption is available for disks before these disks are added to a cluster storage pool.
> [!NOTE]
> The advantage of The Bitlocker encryption can even be made available for disks after they are added to a cluster storage pool.
> The advantage of The BitLocker encryption can even be made available for disks after they are added to a cluster storage pool.
The advantage of encrypting volumes prior to adding them to a cluster is that the disk resource need not be suspended to complete the operation.
To turn on BitLocker for a disk before adding it to a cluster:

6
windows/security/operating-system-security/data-protection/bitlocker/toc.yml
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@ -1,9 +1,9 @@
items:
- name: Overview
href: index.md
- name: ___ BitLocker device encryption
href: bitlocker-device-encryption-overview-windows-10.md
- name: BitLocker Countermeasures
- name: BitLocker device encryption
href: bitlocker-device-encryption.md
- name: BitLocker countermeasures
href: bitlocker-countermeasures.md
- name: Deployment guides
items: