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Teresa-Motiv
2019-10-18 15:08:29 -07:00
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---
title: BitLocker cannot encrypt a drive known TPM issues
title: BitLocker cannot encrypt a drive known TPM issues
description: Provides guidance for troubleshooting known issues that may prevent BitLocker Drive Encryption from encrypting a drive, and that you can attribute to the TPM
ms.reviewer: kaushika
ms.prod: w10
@ -11,7 +11,7 @@ manager: kaushika
audience: ITPro
ms.collection: Windows Security Technologies\BitLocker
ms.topic: troubleshooting
ms.date: 10/7/2019
ms.date: 10/18/2019
---
# BitLocker cannot encrypt a drive: known TPM issues
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### Cause
The TPM did not have sufficient permissions on the TPM Devices container in AD DS. Therefore, the BitLocker recovery key could not be backed up to AD DS, and BitLocker Drive Encryption could not run.
The TPM did not have sufficient permissions on the TPM Devices container in AD DS. Therefore, the BitLocker recovery information could not be backed up to AD DS, and BitLocker Drive Encryption could not run.
This issue appears to be limited to computers that run versions of Windows that are older than Windows 10.