Enforce drive encryption type on operating system drives

ComputerIntune-readyOSEncryptionType_Name

Supported on At least Windows Server 2012 or Windows 8

23H2 · 1.0

What it does

This policy setting allows you to configure the encryption type used by BitLocker Drive Encryption. This policy setting is applied when you turn on BitLocker. Changing the encryption type has no effect if the drive is already encrypted or if encryption is in progress. Choose full encryption to require that the entire drive be encrypted when BitLocker is turned on. Choose used space only encryption to require that only the portion of the drive used to store data is encrypted when BitLocker is turned on. If you enable this policy setting the encryption type that BitLocker will use to encrypt drives is defined by this policy and the encryption type option will not be presented in the BitLocker setup wizard. If you disable or do not configure this policy setting, the BitLocker setup wizard will ask the user to select the encryption type before turning on BitLocker.

What it writes

Hive: HKEY_LOCAL_MACHINE
Registry key: SOFTWARE\Policies\Microsoft\FVE
Value name: OSEncryptionType

In Intune

No native CSP; import the ADMX (Intune-ready).

From Microsoft's Policy CSP DDF files (DDF v2 Files, February 2026), read 18 Oct 2026.

Options

Option	Type	Registry value	Allowed values
Select the encryption typeRequiredDefault: Allow user to choose (default)	Drop-down list	`OSEncryptionType`	Allow user to choose (default)`0` Full encryption`1` Used Space Only encryption`2`

Configure and deploy

Choose a state and the option values; the output below is generated from the template for exactly that.

Enabled · Computer · template defaults

Registry file (.reg)

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\FVE]
"OSEncryptionType"=dword:00000000

PowerShell

$ErrorActionPreference = 'Stop'

function Set-RegistryValue {
    param(
        [Parameter(Mandatory = $true)][string] $Path,
        [Parameter(Mandatory = $true)][string] $Name,
        [Parameter(Mandatory = $true)][string] $PropertyType,
        [Parameter(Mandatory = $true)][object] $Value
    )

    if (-not (Test-Path -LiteralPath $Path)) {
        New-Item -Path $Path -Force | Out-Null
    }

    New-ItemProperty -LiteralPath $Path -Name $Name -PropertyType $PropertyType -Value $Value -Force | Out-Null
}

function Remove-RegistryValue {
    param(
        [Parameter(Mandatory = $true)][string] $Path,
        [Parameter(Mandatory = $true)][string] $Name
    )

    if (Test-Path -LiteralPath $Path) {
        Remove-ItemProperty -LiteralPath $Path -Name $Name -Force -ErrorAction SilentlyContinue
    }
}

function Clear-RegistryKeyValues {
    param(
        [Parameter(Mandatory = $true)][string] $Path
    )

    if (-not (Test-Path -LiteralPath $Path)) {
        return
    }

    foreach ($propertyName in (Get-Item -LiteralPath $Path).Property) {
        Remove-ItemProperty -LiteralPath $Path -Name $propertyName -Force -ErrorAction SilentlyContinue
    }
}

# Policy: Enforce drive encryption type on operating system drives
# Name: OSEncryptionType_Name
# Scope: Machine
# State: Enabled
# Source: VolumeEncryption.admx

Set-RegistryValue -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\FVE' -Name 'OSEncryptionType' -PropertyType 'DWord' -Value 0

The OMA-URI is an inferred ADMX-backed Policy CSP candidate derived from the source ADMX file name and policy name.
Some Microsoft policies use built-in Policy CSP pages whose area names don't match the ADMX file name, so verify the candidate against Microsoft Learn before deployment.

ADMX profile candidate (OMA-URI)

./Device/Vendor/MSFT/Policy/Config/ADMX_VolumeEncryption/OSEncryptionType_Name

ADMX SyncML candidate

<SyncML xmlns="SYNCML:SYNCML1.2">
  <SyncBody>
    <Replace>
      <CmdID>1</CmdID>
      <Item>
        <Meta>
          <Format>chr</Format>
          <Type>text/plain</Type>
        </Meta>
        <Target>
          <LocURI>./Device/Vendor/MSFT/Policy/Config/ADMX_VolumeEncryption/OSEncryptionType_Name</LocURI>
        </Target>
        <Data>&lt;enabled/&gt;
&lt;data id="OSEncryptionTypeDropDown_Name" value="0"/&gt;</Data>
      </Item>
    </Replace>
    <Final/>
  </SyncBody>
</SyncML>

Intune remediation scripts

Detection

$ErrorActionPreference = 'Stop'
$reasons = [System.Collections.Generic.List[string]]::new()

function Test-RegistryValueExists {
    param(
        [Parameter(Mandatory = $true)][string] $Path,
        [Parameter(Mandatory = $true)][string] $Name
    )

    if (-not (Test-Path -LiteralPath $Path)) {
        return $false
    }

    return $null -ne (Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction SilentlyContinue)
}

function Test-RegistryValueEquals {
    param(
        [Parameter(Mandatory = $true)][string] $Path,
        [Parameter(Mandatory = $true)][string] $Name,
        [Parameter(Mandatory = $true)][string] $Kind,
        [Parameter(Mandatory = $true)][object] $Expected
    )

    if (-not (Test-Path -LiteralPath $Path)) {
        return $false
    }

    $valueObject = Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction SilentlyContinue
    if ($null -eq $valueObject) {
        return $false
    }

    $actual = $valueObject.$Name
    switch ($Kind) {
        'String' { return [string]$actual -ceq [string]$Expected }
        'ExpandString' { return [string]$actual -ceq [string]$Expected }
        'DWord' { return [uint32]$actual -eq [uint32]$Expected }
        'QWord' { return [uint64]$actual -eq [uint64]$Expected }
        'MultiString' {
            $actualArray = @($actual)
            $expectedArray = @($Expected)
            if ($actualArray.Count -ne $expectedArray.Count) { return $false }
            for ($index = 0; $index -lt $actualArray.Count; $index++) {
                if ([string]$actualArray[$index] -cne [string]$expectedArray[$index]) { return $false }
            }
            return $true
        }
        'Binary' {
            $actualArray = [byte[]]$actual
            $expectedArray = [byte[]]$Expected
            if ($actualArray.Length -ne $expectedArray.Length) { return $false }
            for ($index = 0; $index -lt $actualArray.Length; $index++) {
                if ($actualArray[$index] -ne $expectedArray[$index]) { return $false }
            }
            return $true
        }
        default { return [string]$actual -ceq [string]$Expected }
    }
}

# Policy: Enforce drive encryption type on operating system drives
# Name: OSEncryptionType_Name
# Scope: Machine
# State: Enabled
# Source: VolumeEncryption.admx

$isMatch = Test-RegistryValueEquals -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\FVE' -Name 'OSEncryptionType' -Kind 'DWord' -Expected 0
if (-not $isMatch) {
    $reasons.Add('Value mismatch: HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\FVE\OSEncryptionType') | Out-Null
}

if ($reasons.Count -eq 0) {
    Write-Output 'Compliant'
    exit 0
}

$reasons | ForEach-Object { Write-Output $_ }
exit 1

Remediation

$ErrorActionPreference = 'Stop'

function Set-RegistryValue {
    param(
        [Parameter(Mandatory = $true)][string] $Path,
        [Parameter(Mandatory = $true)][string] $Name,
        [Parameter(Mandatory = $true)][string] $PropertyType,
        [Parameter(Mandatory = $true)][object] $Value
    )

    if (-not (Test-Path -LiteralPath $Path)) {
        New-Item -Path $Path -Force | Out-Null
    }

    New-ItemProperty -LiteralPath $Path -Name $Name -PropertyType $PropertyType -Value $Value -Force | Out-Null
}

function Remove-RegistryValue {
    param(
        [Parameter(Mandatory = $true)][string] $Path,
        [Parameter(Mandatory = $true)][string] $Name
    )

    if (Test-Path -LiteralPath $Path) {
        Remove-ItemProperty -LiteralPath $Path -Name $Name -Force -ErrorAction SilentlyContinue
    }
}

function Clear-RegistryKeyValues {
    param(
        [Parameter(Mandatory = $true)][string] $Path
    )

    if (-not (Test-Path -LiteralPath $Path)) {
        return
    }

    foreach ($propertyName in (Get-Item -LiteralPath $Path).Property) {
        Remove-ItemProperty -LiteralPath $Path -Name $propertyName -Force -ErrorAction SilentlyContinue
    }
}

# Policy: Enforce drive encryption type on operating system drives
# Name: OSEncryptionType_Name
# Scope: Machine
# State: Enabled
# Source: VolumeEncryption.admx

Set-RegistryValue -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\FVE' -Name 'OSEncryptionType' -PropertyType 'DWord' -Value 0

History 3 retained releases

22H2 · 1.015 Jul 2024
- Already present in the first release ChangeIntel keeps.

2 later releases left it unchanged.

Template

Internal name: OSEncryptionType_Name
Namespace: Microsoft.Policies.VolumeEncryption
Template file: VolumeEncryption.admx
Release: Windows 11 23H2 · 1.0 · file set d784d0ea5f14a680…

Definition, editor controls and support

Definition

<policy class="Machine" displayName="$(string.OSEncryptionType_Name)" explainText="$(string.EncryptionType_Help)" key="SOFTWARE\Policies\Microsoft\FVE" name="OSEncryptionType_Name" presentation="$(presentation.OSEncryptionType)" valueName="OSEncryptionType" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions">
      <parentCategory ref="Microsoft.Policies.VolumeEncryption:FVEOSCategory" />
      <supportedOn ref="Microsoft.Policies.VolumeEncryption:SUPPORTED_Windows8NoARM" />

      <elements>
        <enum id="OSEncryptionTypeDropDown_Name" required="true" valueName="OSEncryptionType">
          <item displayName="$(string.EncryptionTypeDropDown_UserChooses_Name)">
            <value>
              <decimal value="0" />
            </value>
          </item>
          <item displayName="$(string.EncryptionTypeDropDown_FullEncryption_Name)">
            <value>
              <decimal value="1" />
            </value>
          </item>
          <item displayName="$(string.EncryptionTypeDropDown_DataOnlyEncryption_Name)">
            <value>
              <decimal value="2" />
            </value>
          </item>
        </enum>
      </elements>
    </policy>

Editor controls

<presentation id="OSEncryptionType" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions">
        <dropdownList defaultItem="0" noSort="true" refId="OSEncryptionTypeDropDown_Name">Select the encryption type:</dropdownList>
      </presentation>

Supported platforms and category

Microsoft.Policies.VolumeEncryption:category:FVECategory
<category displayName="$(string.FVECategory)" name="FVECategory" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions">
      <parentCategory ref="Microsoft.Policies.Windows:WindowsComponents" />
    </category>
Microsoft.Policies.VolumeEncryption:category:FVEOSCategory
<category displayName="$(string.FVEOSCategory)" name="FVEOSCategory" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions">
      <parentCategory ref="Microsoft.Policies.VolumeEncryption:FVECategory" />
    </category>
Microsoft.Policies.VolumeEncryption:definition:SUPPORTED_Windows8NoARM
<definition displayName="$(string.SUPPORTED_Windows8NoARM)" name="SUPPORTED_Windows8NoARM" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions" />
Microsoft.Policies.Windows:category:WindowsComponents
<category displayName="$(string.WindowsComponents)" explainText="$(string.WindowsComponents_Help)" name="WindowsComponents" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions" />
Microsoft.Policies.VolumeEncryption:category:FVECategory
<category displayName="$(string.FVECategory)" name="FVECategory" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions">
      <parentCategory ref="Microsoft.Policies.Windows:WindowsComponents" />
    </category>
<strings><string id="Microsoft.Policies.VolumeEncryption:FVECategory">BitLocker Drive Encryption</string></strings>
Microsoft.Policies.VolumeEncryption:category:FVEOSCategory
<category displayName="$(string.FVEOSCategory)" name="FVEOSCategory" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions">
      <parentCategory ref="Microsoft.Policies.VolumeEncryption:FVECategory" />
    </category>
<strings><string id="Microsoft.Policies.VolumeEncryption:FVEOSCategory">Operating System Drives</string></strings>
Microsoft.Policies.VolumeEncryption:definition:SUPPORTED_Windows8NoARM
<definition displayName="$(string.SUPPORTED_Windows8NoARM)" name="SUPPORTED_Windows8NoARM" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions" />
<strings><string id="Microsoft.Policies.VolumeEncryption:SUPPORTED_Windows8NoARM">At least Windows Server 2012 or Windows 8</string></strings>
Microsoft.Policies.Windows:category:WindowsComponents
<category displayName="$(string.WindowsComponents)" explainText="$(string.WindowsComponents_Help)" name="WindowsComponents" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions" />
<strings><string id="Microsoft.Policies.Windows:WindowsComponents">Windows Components</string><string id="Microsoft.Policies.Windows:WindowsComponents_Help">Contains settings for operating system components.</string></strings>