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Set-TpmOwnerAuth

Changes the TPM owner authorization value.

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Last verified: 2026-10-26

Microsoft TrustedPlatformModule reference: Changes the TPM owner authorization value. The syntax and selected example below are adapted from the pinned Windows Server 2025 reference. Module availability, target configuration and delegated permissions determine whether it can run in your environment. Documentation and parameter text: Microsoft, CC BY 4.0; formatting adapted by Cmdlet World. No execution testing is claimed.

Set-TpmOwnerAuth -File <String> -NewOwnerAuthorization <String> [<CommonParameters>]

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Required permissions

Use an account with the target resource permissions documented for Set-TpmOwnerAuth. Modifying administrative cmdlets may require elevation or delegated administration. This catalog does not assert that ordinary users can execute the command.

Supported environments

Windows / TrustedPlatformModule · Windows Server 2025 documentation; feature/module prerequisites apply

Parameters

-File (required): Specifies a file that contains the current owner authorization value for the TPM. You can use the TPM Management Console to create this file.
-NewFile (required): Specifies a file that contains the new owner authorization value for a TPM.
-NewOwnerAuthorization (required): Specifies a new owner authorization value for a TPM.
-OwnerAuthorization: Specifies the current owner authorization value for a TPM.

Prerequisites

Windows with the TrustedPlatformModule module and the Windows feature or management tools that provide it. Confirm target connectivity and version compatibility using the linked Microsoft reference.

Security considerations

This cmdlet changes system state. Review every target and parameter in the official reference, test outside production, and prepare an appropriate backup or rollback. Do not execute the example automatically.

Examples

Example 1: Replace imported owner authorization value

Set-TpmOwnerAuth -NewOwnerAuthorization "h4FCmNeWVNp5IMHxRfFL9QEq4vM="

This command replaces the current owner authorization value with the specified owner authorization value. The command does not specify the current owner authorization value, so the cmdlet attempts to find it in the registry. This command does not import the owner authorization value into the registry. After you run this command, you can use the Import-TpmOwnerAuth cmdlet to import the new value into the registry, if necessary. Source: Microsoft, CC BY 4.0; transcript prompt/output removed. This example was not executed.

Sources

https://github.com/MicrosoftDocs/windows-powershell-docs/blob/b7645dd8c687139b28e845119da30ec670526507/docset/winserver2025-ps/TrustedPlatformModule/Set-TpmOwnerAuth.md

https://learn.microsoft.com/powershell/module/trustedplatformmodule/set-tpmownerauth?view=windowsserver2025-ps

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