Secondary calendar settings

UserNeeds changes for IntuneL_Secondarycalendarsettings

Supported on SUPPORTED_Windows7 (defined in the Windows templates)

5568.1000

What it does

Checks/Unchecks the option "Enable alternate calendar".

What it writes

Hive: HKEY_CURRENT_USER
Registry key: software\policies\microsoft\office\16.0\outlook\options\calendar

Why it needs changes for Intune

Policy references a Windows supportedOn definition.
ADMX-INTUNE-WINDOWS-SUPPORTEDON-REFERENCE

Options

Option	Type	Registry value	Allowed values
Enable alternate calendar	Checkbox	`show bothcal`	On (1) or off (0)
Set secondary calendar languageDefault: Buddhist (Thai)	Drop-down list	`alter calendar lang`	Buddhist (Thai)`1054` Chinese Lunar (Simplified Chinese)`2052` Chinese Lunar (Traditional Chinese)`1028` Gregorian (Arabic)`1025` Gregorian (English)`1033` Gregorian (Hebrew)`1037` Gregorian (Transliterated English)`1025` Gregorian (Transliterated French)`1025` Hebrew Lunar (English)`1033` Hebrew Lunar (Hebrew)`1037` Hijri (Arabic)`1025` Hijri (English)`1033` Japanese Lunar (Japanese)`1041` Korean Lunar (Korean)`1042` Rokuyou (Japanese)`1041` Saka (English)`1033` Saka (Hindi)`1081` Zodiac (Japanese)`1041` Zodiac (Korean)`1042` Zodiac (Simplified Chinese)`2052` Zodiac (Traditional Chinese)`1028`

Configure and deploy

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

State Enabled Disabled Not configured

Options used when Enabled

Enable alternate calendar

Set secondary calendar language

Enabled · User · template defaults

Registry file (.reg)

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\software\policies\microsoft\office\16.0\outlook\options\calendar]
"alter calendar lang"=dword:0000041E
"alter calendar type"=dword:00000007
"show bothcal"=dword:00000001

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: Secondary calendar settings
# Name: L_Secondarycalendarsettings
# Scope: User
# State: Enabled
# Source: outlk16.admx

Set-RegistryValue -Path 'Registry::HKEY_CURRENT_USER\software\policies\microsoft\office\16.0\outlook\options\calendar' -Name 'show bothcal' -PropertyType 'DWord' -Value 1

Set-RegistryValue -Path 'Registry::HKEY_CURRENT_USER\software\policies\microsoft\office\16.0\outlook\options\calendar' -Name 'alter calendar lang' -PropertyType 'DWord' -Value 1054

Set-RegistryValue -Path 'Registry::HKEY_CURRENT_USER\software\policies\microsoft\office\16.0\outlook\options\calendar' -Name 'alter calendar type' -PropertyType 'DWord' -Value 7

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.
The generated payload is incomplete because one or more ADMX element values were not supplied: L_Usesecondarycalendar

ADMX profile candidate (OMA-URI)

./User/Vendor/MSFT/Policy/Config/ADMX_outlk16/L_Secondarycalendarsettings

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: Secondary calendar settings
# Name: L_Secondarycalendarsettings
# Scope: User
# State: Enabled
# Source: outlk16.admx

$isMatch = Test-RegistryValueEquals -Path 'Registry::HKEY_CURRENT_USER\software\policies\microsoft\office\16.0\outlook\options\calendar' -Name 'show bothcal' -Kind 'DWord' -Expected 1
if (-not $isMatch) {
    $reasons.Add('Value mismatch: HKEY_CURRENT_USER\software\policies\microsoft\office\16.0\outlook\options\calendar\show bothcal') | Out-Null
}

$isMatch = Test-RegistryValueEquals -Path 'Registry::HKEY_CURRENT_USER\software\policies\microsoft\office\16.0\outlook\options\calendar' -Name 'alter calendar lang' -Kind 'DWord' -Expected 1054
if (-not $isMatch) {
    $reasons.Add('Value mismatch: HKEY_CURRENT_USER\software\policies\microsoft\office\16.0\outlook\options\calendar\alter calendar lang') | Out-Null
}

$isMatch = Test-RegistryValueEquals -Path 'Registry::HKEY_CURRENT_USER\software\policies\microsoft\office\16.0\outlook\options\calendar' -Name 'alter calendar type' -Kind 'DWord' -Expected 7
if (-not $isMatch) {
    $reasons.Add('Value mismatch: HKEY_CURRENT_USER\software\policies\microsoft\office\16.0\outlook\options\calendar\alter calendar type') | 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: Secondary calendar settings
# Name: L_Secondarycalendarsettings
# Scope: User
# State: Enabled
# Source: outlk16.admx

Set-RegistryValue -Path 'Registry::HKEY_CURRENT_USER\software\policies\microsoft\office\16.0\outlook\options\calendar' -Name 'show bothcal' -PropertyType 'DWord' -Value 1

Set-RegistryValue -Path 'Registry::HKEY_CURRENT_USER\software\policies\microsoft\office\16.0\outlook\options\calendar' -Name 'alter calendar lang' -PropertyType 'DWord' -Value 1054

Set-RegistryValue -Path 'Registry::HKEY_CURRENT_USER\software\policies\microsoft\office\16.0\outlook\options\calendar' -Name 'alter calendar type' -PropertyType 'DWord' -Value 7

History 1 retained release

5568.100010 Aug 2026
- Already present in the first release ChangeIntel keeps.

Template

Internal name: L_Secondarycalendarsettings
Namespace: outlk16.Office.Microsoft.Policies.Windows
Template file: outlk16.admx
Release: Microsoft 365 Apps 5568.1000 · file set 8be05d876aae137d…

Definition, editor controls and support

Definition

<policy class="User" displayName="$(string.L_Secondarycalendarsettings)" explainText="$(string.L_ChecksUncheckstheoptionEnablealternatecalendar)" key="software\policies\microsoft\office\16.0\outlook\options\calendar" name="L_Secondarycalendarsettings" presentation="$(presentation.L_Secondarycalendarsettings)" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions">
      <parentCategory ref="outlk16.Office.Microsoft.Policies.Windows:L_Calendaroptions" />
      <supportedOn ref="Microsoft.Policies.Windows:SUPPORTED_Windows7" />
      <elements>
        <boolean id="L_Usesecondarycalendar" valueName="show bothcal">
          <trueValue>
            <decimal value="1" />
          </trueValue>
          <falseValue>
            <decimal value="0" />
          </falseValue>
        </boolean>
        <enum id="L_Setsecondarycalendarlanguage" valueName="alter calendar lang">
          <item displayName="$(string.L_BuddhistThai)">
            <value>
              <decimal value="1054" />
            </value>
            <valueList>
              <item key="software\policies\microsoft\office\16.0\outlook\options\calendar" valueName="alter calendar type">
                <value>
                  <decimal value="7" />
                </value>
              </item>
            </valueList>
          </item>
          <item displayName="$(string.L_ChineseLunarSimplifiedChinese)">
            <value>
              <decimal value="2052" />
            </value>
            <valueList>
              <item key="software\policies\microsoft\office\16.0\outlook\options\calendar" valueName="alter calendar type">
                <value>
                  <decimal value="15" />
                </value>
              </item>
            </valueList>
          </item>
          <item displayName="$(string.L_ChineseLunarTraditionalChinese)">
            <value>
              <decimal value="1028" />
            </value>
            <valueList>
              <item key="software\policies\microsoft\office\16.0\outlook\options\calendar" valueName="alter calendar type">
                <value>
                  <decimal value="15" />
                </value>
              </item>
            </valueList>
          </item>
          <item displayName="$(string.L_GregorianArabic)">
            <value>
              <decimal value="1025" />
            </value>
            <valueList>
              <item key="software\policies\microsoft\office\16.0\outlook\options\calendar" valueName="alter calendar type">
                <value>
                  <decimal value="10" />
                </value>
              </item>
            </valueList>
          </item>
          <item displayName="$(string.L_GregorianEnglish)">
            <value>
              <decimal value="1033" />
            </value>
            <valueList>
              <item key="software\policies\microsoft\office\16.0\outlook\options\calendar" valueName="alter calendar type">
                <value>
                  <decimal value="1" />
                </value>
              </item>
            </valueList>
          </item>
          <item displayName="$(string.L_GregorianHebrew)">
            <value>
              <decimal value="1037" />
            </value>
            <valueList>
              <item key="software\policies\microsoft\office\16.0\outlook\options\calendar" valueName="alter calendar type">
                <value>
                  <decimal value="1" />
                </value>
              </item>
            </valueList>
          </item>
          <item displayName="$(string.L_GregorianTransliteratedEnglish)">
            <value>
              <decimal value="1025" />
            </value>
            <valueList>
              <item key="software\policies\microsoft\office\16.0\outlook\options\calendar" valueName="alter calendar type">
                <value>
                  <decimal value="11" />
                </value>
              </item>
            </valueList>
          </item>
          <item displayName="$(string.L_GregorianTransliteratedFrench)">
            <value>
              <decimal value="1025" />
            </value>
            <valueList>
              <item key="software\policies\microsoft\office\16.0\outlook\options\calendar" valueName="alter calendar type">
                <value>
                  <decimal value="12" />
                </value>
              </item>
            </valueList>
          </item>
          <item displayName="$(string.L_HebrewLunarEnglish)">
            <value>
              <decimal value="1033" />
            </value>
            <valueList>
              <item key="software\policies\microsoft\office\16.0\outlook\options\calendar" valueName="alter calendar type">
                <value>
                  <decimal value="8" />
                </value>
              </item>
            </valueList>
          </item>
          <item displayName="$(string.L_HebrewLunarHebrew)">
            <value>
              <decimal value="1037" />
            </value>
            <valueList>
              <item key="software\policies\microsoft\office\16.0\outlook\options\calendar" valueName="alter calendar type">
                <value>
                  <decimal value="8" />
                </value>
              </item>
            </valueList>
          </item>
          <item displayName="$(string.L_HijriArabic)">
            <value>
              <decimal value="1025" />
            </value>
            <valueList>
              <item key="software\policies\microsoft\office\16.0\outlook\options\calendar" valueName="alter calendar type">
                <value>
                  <decimal value="6" />
                </value>
              </item>
            </valueList>
          </item>
          <item displayName="$(string.L_HijriEnglish)">
            <value>
              <decimal value="1033" />
            </value>
            <valueList>
              <item key="software\policies\microsoft\office\16.0\outlook\options\calendar" valueName="alter calendar type">
                <value>
                  <decimal value="6" />
                </value>
              </item>
            </valueList>
          </item>
          <item displayName="$(string.L_JapaneseLunarJapanese)">
            <value>
              <decimal value="1041" />
            </value>
            <valueList>
              <item key="software\policies\microsoft\office\16.0\outlook\options\calendar" valueName="alter calendar type">
                <value>
                  <decimal value="14" />
                </value>
              </item>
            </valueList>
          </item>
          <item displayName="$(string.L_KoreanLunarKorean)">
            <value>
              <decimal value="1042" />
            </value>
            <valueList>
              <item key="software\policies\microsoft\office\16.0\outlook\options\calendar" valueName="alter calendar type">
                <value>
                  <decimal value="20" />
                </value>
              </item>
            </valueList>
          </item>
          <item displayName="$(string.L_RokuyouJapanese)">
            <value>
              <decimal value="1041" />
            </value>
            <valueList>
              <item key="software\policies\microsoft\office\16.0\outlook\options\calendar" valueName="alter calendar type">
                <value>
                  <decimal value="19" />
                </value>
              </item>
            </valueList>
          </item>
          <item displayName="$(string.L_SakaEnglish)">
            <value>
              <decimal value="1033" />
            </value>
            <valueList>
              <item key="software\policies\microsoft\office\16.0\outlook\options\calendar" valueName="alter calendar type">
                <value>
                  <decimal value="16" />
                </value>
              </item>
            </valueList>
          </item>
          <item displayName="$(string.L_SakaHindi)">
            <value>
              <decimal value="1081" />
            </value>
            <valueList>
              <item key="software\policies\microsoft\office\16.0\outlook\options\calendar" valueName="alter calendar type">
                <value>
                  <decimal value="16" />
                </value>
              </item>
            </valueList>
          </item>
          <item displayName="$(string.L_ZodiacJapanese)">
            <value>
              <decimal value="1041" />
            </value>
            <valueList>
              <item key="software\policies\microsoft\office\16.0\outlook\options\calendar" valueName="alter calendar type">
                <value>
                  <decimal value="18" />
                </value>
              </item>
            </valueList>
          </item>
          <item displayName="$(string.L_ZodiacKorean)">
            <value>
              <decimal value="1042" />
            </value>
            <valueList>
              <item key="software\policies\microsoft\office\16.0\outlook\options\calendar" valueName="alter calendar type">
                <value>
                  <decimal value="18" />
                </value>
              </item>
            </valueList>
          </item>
          <item displayName="$(string.L_ZodiacSimplifiedChinese)">
            <value>
              <decimal value="2052" />
            </value>
            <valueList>
              <item key="software\policies\microsoft\office\16.0\outlook\options\calendar" valueName="alter calendar type">
                <value>
                  <decimal value="17" />
                </value>
              </item>
            </valueList>
          </item>
          <item displayName="$(string.L_ZodiacTraditionalChinese)">
            <value>
              <decimal value="1028" />
            </value>
            <valueList>
              <item key="software\policies\microsoft\office\16.0\outlook\options\calendar" valueName="alter calendar type">
                <value>
                  <decimal value="17" />
                </value>
              </item>
            </valueList>
          </item>
        </enum>
      </elements>
    </policy>

Editor controls

<presentation id="L_Secondarycalendarsettings" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions">
        <checkBox refId="L_Usesecondarycalendar">Enable alternate calendar</checkBox>
        <dropdownList defaultItem="0" noSort="true" refId="L_Setsecondarycalendarlanguage">Set secondary calendar language:</dropdownList>
      </presentation>

Supported platforms and category

outlk16.Office.Microsoft.Policies.Windows:category:L_Calendaroptions
<category displayName="$(string.L_Calendaroptions)" name="L_Calendaroptions" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions">
      <parentCategory ref="outlk16.Office.Microsoft.Policies.Windows:L_Preferences" />
    </category>
outlk16.Office.Microsoft.Policies.Windows:category:L_MicrosoftOfficeOutlook
<category displayName="$(string.L_MicrosoftOfficeOutlook)" name="L_MicrosoftOfficeOutlook" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions" />
outlk16.Office.Microsoft.Policies.Windows:category:L_OutlookOptions
<category displayName="$(string.L_OutlookOptions)" name="L_OutlookOptions" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions">
      <parentCategory ref="outlk16.Office.Microsoft.Policies.Windows:L_MicrosoftOfficeOutlook" />
    </category>
outlk16.Office.Microsoft.Policies.Windows:category:L_Preferences
<category displayName="$(string.L_Preferences)" name="L_Preferences" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions">
      <parentCategory ref="outlk16.Office.Microsoft.Policies.Windows:L_OutlookOptions" />
    </category>
outlk16.Office.Microsoft.Policies.Windows:unresolved:Microsoft.Policies.Windows:SUPPORTED_Windows7
<unresolved reference="Microsoft.Policies.Windows:SUPPORTED_Windows7" />
outlk16.Office.Microsoft.Policies.Windows:category:L_Calendaroptions
<category displayName="$(string.L_Calendaroptions)" name="L_Calendaroptions" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions">
      <parentCategory ref="outlk16.Office.Microsoft.Policies.Windows:L_Preferences" />
    </category>
<strings><string id="outlk16.Office.Microsoft.Policies.Windows:L_Calendaroptions">Calendar Options</string></strings>
outlk16.Office.Microsoft.Policies.Windows:category:L_MicrosoftOfficeOutlook
<category displayName="$(string.L_MicrosoftOfficeOutlook)" name="L_MicrosoftOfficeOutlook" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions" />
<strings><string id="outlk16.Office.Microsoft.Policies.Windows:L_MicrosoftOfficeOutlook">Microsoft Outlook 2016</string></strings>
outlk16.Office.Microsoft.Policies.Windows:category:L_OutlookOptions
<category displayName="$(string.L_OutlookOptions)" name="L_OutlookOptions" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions">
      <parentCategory ref="outlk16.Office.Microsoft.Policies.Windows:L_MicrosoftOfficeOutlook" />
    </category>
<strings><string id="outlk16.Office.Microsoft.Policies.Windows:L_OutlookOptions">Outlook Options</string></strings>
outlk16.Office.Microsoft.Policies.Windows:category:L_Preferences
<category displayName="$(string.L_Preferences)" name="L_Preferences" xmlns="http://schemas.microsoft.com/GroupPolicy/2006/07/PolicyDefinitions">
      <parentCategory ref="outlk16.Office.Microsoft.Policies.Windows:L_OutlookOptions" />
    </category>
<strings><string id="outlk16.Office.Microsoft.Policies.Windows:L_Preferences">Preferences</string></strings>