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Justinha 2017-04-10 12:29:24 -07:00
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windows/keep-secure/bitlocker-recovery-guide-plan.md
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@ -45,7 +45,7 @@ BitLocker recovery is the process by which you can restore access to a BitLocker
The following list provides examples of specific events that will cause BitLocker to enter recovery mode when attempting to start the operating system drive: The following list provides examples of specific events that will cause BitLocker to enter recovery mode when attempting to start the operating system drive:
- On PCs that use either BitLocker or Device Encryption, when an attack is detected, the device will immediately reboot and enter into BitLocker recovery mode. To take advantage of this functionality Administrators can set the **Interactive logon: Machine account lockout threshold** Group Policy setting located in **\\Computer Configuration\\Windows Settings\\Security Settings\\Local Policies\\Security Options** in the Local Group Policy Editor, or use the **MaxFailedPasswordAttempts** policy of [Exchange ActiveSync](http://technet.microsoft.com/library/aa998357.aspx) (also configurable through [Windows Intune](http://technet.microsoft.com/library/jj733621.aspx)), to limit the number of failed password attempts before the device goes into Device Lockout. - On PCs that use either BitLocker or Device Encryption, when an attack is detected, the device will immediately reboot and enter into BitLocker recovery mode. To take advantage of this functionality Administrators can set the **Interactive logon: Machine account lockout threshold** Group Policy setting located in **\\Computer Configuration\\Windows Settings\\Security Settings\\Local Policies\\Security Options** in the Local Group Policy Editor, or use the **MaxFailedPasswordAttempts** policy of [Exchange ActiveSync](http://technet.microsoft.com/library/aa998357.aspx) (also configurable through [Windows Intune](http://technet.microsoft.com/library/jj733621.aspx)), to limit the number of failed password attempts before the device goes into Device Lockout.
- On devices with TPM 1.2, changing the BIOS or firmware boot device order causes BitLocker recovery. However, devices with TPM 2.0 do not consider a firmware change of boot order as a security threat because the OS Boot Loader is not compromised. - On devices with TPM 1.2, changing the BIOS or firmware boot device order causes BitLocker recovery. However, devices with TPM 2.0 do not start BitLocker recovery in this case. TPM 2.0 does not consider a firmware change of boot device order as a security threat because the OS Boot Loader is not compromised.
- Having the CD or DVD drive before the hard drive in the BIOS boot order and then inserting or removing a CD or DVD. - Having the CD or DVD drive before the hard drive in the BIOS boot order and then inserting or removing a CD or DVD.
- Failing to boot from a network drive before booting from the hard drive. - Failing to boot from a network drive before booting from the hard drive.
- Docking or undocking a portable computer. In some instances (depending on the computer manufacturer and the BIOS), the docking condition of the portable computer is part of the system measurement and must be consistent to validate the system status and unlock BitLocker. This means that if a portable computer is connected to its docking station when BitLocker is turned on, then it might also need to be connected to the docking station when it is unlocked. Conversely, if a portable computer is not connected to its docking station when BitLocker is turned on, then it might need to be disconnected from the docking station when it is unlocked. - Docking or undocking a portable computer. In some instances (depending on the computer manufacturer and the BIOS), the docking condition of the portable computer is part of the system measurement and must be consistent to validate the system status and unlock BitLocker. This means that if a portable computer is connected to its docking station when BitLocker is turned on, then it might also need to be connected to the docking station when it is unlocked. Conversely, if a portable computer is not connected to its docking station when BitLocker is turned on, then it might need to be disconnected from the docking station when it is unlocked.