Overview
This knowledge base will demonstrate how to set the default font back to 'Segoe UI' with size 10 font for Microsoft Outlook (Classic)
Steps for Microsoft Outlook
1. Open Microsoft Outlook, select File then select Options
2. Then select Mail then select Stationery and Fonts.
3. For New mail messages, Replying or forwarding messages and Composing and reading plain text messages, select the desired font and size. 
4. Where all 3 'Font' options are selected as 'Segoe UI' with size 10. Then select OK.
5. On the same device, go to PowerShell, and run the following the script, this will get the values for each section.
$Path = "registry::HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Common\mailsettings"
$Name1 = "ReplyFontComplex"
$Name2 = "ComposeFontComplex"
$Name3 = "ReplyFontSimple"
$Name4 = "ComposeFontSimple"
$Name5 = "TextFontComplex"
$Name6 = "TextFontSimple"
(Get-ItemProperty -Path $Path -Name $Name1 -ErrorAction Stop | Select-Object -ExpandProperty $Name1 | ForEach-Object { '{0:X2}' -f $_ }) -join ','
(Get-ItemProperty -Path $Path -Name $Name2 -ErrorAction Stop | Select-Object -ExpandProperty $Name2 | ForEach-Object { '{0:X2}' -f $_ }) -join ','
(Get-ItemProperty -Path $Path -Name $Name3 -ErrorAction Stop | Select-Object -ExpandProperty $Name3 | ForEach-Object { '{0:X2}' -f $_ }) -join ','
(Get-ItemProperty -Path $Path -Name $Name4 -ErrorAction Stop | Select-Object -ExpandProperty $Name4 | ForEach-Object { '{0:X2}' -f $_ }) -join ','
(Get-ItemProperty -Path $Path -Name $Name5 -ErrorAction Stop | Select-Object -ExpandProperty $Name5 | ForEach-Object { '{0:X2}' -f $_ }) -join ','
(Get-ItemProperty -Path $Path -Name $Name6 -ErrorAction Stop | Select-Object -ExpandProperty $Name6 | ForEach-Object { '{0:X2}' -f $_ }) -join ','
You will get an output like so:
6. Update the values from PowerShell to create Install.ps1.
$ValueSimple = "3C,00,00,00,1F,00,00,F8,00,00,00,40,C8,00,00,00,00,00,00,00,00,00,00,00,00,22,53,65,67,6F,65,20,55,49,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00"
$ValueComposeComplex = "3C,68,74,6D,6C,3E,0D,0A,0D,0A,3C,68,65,61,64,3E,0D,0A,3C,73,74,79,6C,65,3E,0D,0A,0D,0A,20,2F,2A,20,53,74,79,6C,65,20,44,65,66,69,6E,69,74,69,6F,6E,73,20,2A,2F,0D,0A,20,73,70,61,6E,2E,50,65,72,73,6F,6E,61,6C,43,6F,6D,70,6F,73,65,53,74,79,6C,65,0D,0A,09,7B,6D,73,6F,2D,73,74,79,6C,65,2D,6E,61,6D,65,3A,22,50,65,72,73,6F,6E,61,6C,20,43,6F,6D,70,6F,73,65,20,53,74,79,6C,65,22,3B,0D,0A,09,6D,73,6F,2D,73,74,79,6C,65,2D,74,79,70,65,3A,70,65,72,73,6F,6E,61,6C,2D,63,6F,6D,70,6F,73,65,3B,0D,0A,09,6D,73,6F,2D,73,74,79,6C,65,2D,6E,6F,73,68,6F,77,3A,79,65,73,3B,0D,0A,09,6D,73,6F,2D,73,74,79,6C,65,2D,75,6E,68,69,64,65,3A,6E,6F,3B,0D,0A,09,6D,73,6F,2D,61,6E,73,69,2D,66,6F,6E,74,2D,73,69,7A,65,3A,31,30,2E,30,70,74,3B,0D,0A,09,6D,73,6F,2D,62,69,64,69,2D,66,6F,6E,74,2D,73,69,7A,65,3A,31,31,2E,30,70,74,3B,0D,0A,09,66,6F,6E,74,2D,66,61,6D,69,6C,79,3A,22,53,65,67,6F,65,20,55,49,22,2C,73,61,6E,73,2D,73,65,72,69,66,3B,0D,0A,09,6D,73,6F,2D,61,73,63,69,69,2D,66,6F,6E,74,2D,66,61,6D,69,6C,79,3A,22,53,65,67,6F,65,20,55,49,22,3B,0D,0A,09,6D,73,6F,2D,68,61,6E,73,69,2D,66,6F,6E,74,2D,66,61,6D,69,6C,79,3A,22,53,65,67,6F,65,20,55,49,22,3B,0D,0A,09,6D,73,6F,2D,62,69,64,69,2D,66,6F,6E,74,2D,66,61,6D,69,6C,79,3A,22,54,69,6D,65,73,20,4E,65,77,20,52,6F,6D,61,6E,22,3B,0D,0A,09,6D,73,6F,2D,62,69,64,69,2D,74,68,65,6D,65,2D,66,6F,6E,74,3A,6D,69,6E,6F,72,2D,62,69,64,69,3B,0D,0A,09,63,6F,6C,6F,72,3A,77,69,6E,64,6F,77,74,65,78,74,3B,7D,0D,0A,2D,2D,3E,0D,0A,3C,2F,73,74,79,6C,65,3E,0D,0A,3C,2F,68,65,61,64,3E,0D,0A,0D,0A,3C,2F,68,74,6D,6C,3E,0D,0A"
$ValueReplyComplex = "3C,68,74,6D,6C,3E,0D,0A,0D,0A,3C,68,65,61,64,3E,0D,0A,3C,73,74,79,6C,65,3E,0D,0A,0D,0A,20,2F,2A,20,53,74,79,6C,65,20,44,65,66,69,6E,69,74,69,6F,6E,73,20,2A,2F,0D,0A,20,73,70,61,6E,2E,50,65,72,73,6F,6E,61,6C,52,65,70,6C,79,53,74,79,6C,65,31,0D,0A,09,7B,6D,73,6F,2D,73,74,79,6C,65,2D,6E,61,6D,65,3A,22,50,65,72,73,6F,6E,61,6C,20,52,65,70,6C,79,20,53,74,79,6C,65,31,22,3B,0D,0A,09,6D,73,6F,2D,73,74,79,6C,65,2D,74,79,70,65,3A,70,65,72,73,6F,6E,61,6C,2D,72,65,70,6C,79,3B,0D,0A,09,6D,73,6F,2D,73,74,79,6C,65,2D,6E,6F,73,68,6F,77,3A,79,65,73,3B,0D,0A,09,6D,73,6F,2D,73,74,79,6C,65,2D,75,6E,68,69,64,65,3A,6E,6F,3B,0D,0A,09,6D,73,6F,2D,61,6E,73,69,2D,66,6F,6E,74,2D,73,69,7A,65,3A,31,30,2E,30,70,74,3B,0D,0A,09,6D,73,6F,2D,62,69,64,69,2D,66,6F,6E,74,2D,73,69,7A,65,3A,31,31,2E,30,70,74,3B,0D,0A,09,66,6F,6E,74,2D,66,61,6D,69,6C,79,3A,22,53,65,67,6F,65,20,55,49,22,2C,73,61,6E,73,2D,73,65,72,69,66,3B,0D,0A,09,6D,73,6F,2D,61,73,63,69,69,2D,66,6F,6E,74,2D,66,61,6D,69,6C,79,3A,22,53,65,67,6F,65,20,55,49,22,3B,0D,0A,09,6D,73,6F,2D,68,61,6E,73,69,2D,66,6F,6E,74,2D,66,61,6D,69,6C,79,3A,22,53,65,67,6F,65,20,55,49,22,3B,0D,0A,09,6D,73,6F,2D,62,69,64,69,2D,66,6F,6E,74,2D,66,61,6D,69,6C,79,3A,22,54,69,6D,65,73,20,4E,65,77,20,52,6F,6D,61,6E,22,3B,0D,0A,09,6D,73,6F,2D,62,69,64,69,2D,74,68,65,6D,65,2D,66,6F,6E,74,3A,6D,69,6E,6F,72,2D,62,69,64,69,3B,0D,0A,09,63,6F,6C,6F,72,3A,77,69,6E,64,6F,77,74,65,78,74,3B,7D,0D,0A,2D,2D,3E,0D,0A,3C,2F,73,74,79,6C,65,3E,0D,0A,3C,2F,68,65,61,64,3E,0D,0A,0D,0A,3C,2F,68,74,6D,6C,3E,0D,0A"
$ValueTextComplex = "3C,68,74,6D,6C,3E,0D,0A,0D,0A,3C,68,65,61,64,3E,0D,0A,3C,73,74,79,6C,65,3E,0D,0A,0D,0A,20,2F,2A,20,53,74,79,6C,65,20,44,65,66,69,6E,69,74,69,6F,6E,73,20,2A,2F,0D,0A,20,70,2E,4D,73,6F,50,6C,61,69,6E,54,65,78,74,2C,20,6C,69,2E,4D,73,6F,50,6C,61,69,6E,54,65,78,74,2C,20,64,69,76,2E,4D,73,6F,50,6C,61,69,6E,54,65,78,74,0D,0A,09,7B,6D,73,6F,2D,73,74,79,6C,65,2D,6E,6F,73,68,6F,77,3A,79,65,73,3B,0D,0A,09,6D,73,6F,2D,73,74,79,6C,65,2D,70,72,69,6F,72,69,74,79,3A,39,39,3B,0D,0A,09,6D,73,6F,2D,73,74,79,6C,65,2D,6C,69,6E,6B,3A,22,50,6C,61,69,6E,20,54,65,78,74,20,43,68,61,72,22,3B,0D,0A,09,6D,61,72,67,69,6E,3A,30,63,6D,3B,0D,0A,09,6D,73,6F,2D,70,61,67,69,6E,61,74,69,6F,6E,3A,77,69,64,6F,77,2D,6F,72,70,68,61,6E,3B,0D,0A,09,66,6F,6E,74,2D,73,69,7A,65,3A,31,30,2E,30,70,74,3B,0D,0A,09,6D,73,6F,2D,62,69,64,69,2D,66,6F,6E,74,2D,73,69,7A,65,3A,31,30,2E,35,70,74,3B,0D,0A,09,66,6F,6E,74,2D,66,61,6D,69,6C,79,3A,22,53,65,67,6F,65,20,55,49,22,2C,73,61,6E,73,2D,73,65,72,69,66,3B,0D,0A,09,6D,73,6F,2D,66,61,72,65,61,73,74,2D,66,6F,6E,74,2D,66,61,6D,69,6C,79,3A,22,54,69,6D,65,73,20,4E,65,77,20,52,6F,6D,61,6E,22,3B,0D,0A,09,6D,73,6F,2D,62,69,64,69,2D,66,6F,6E,74,2D,66,61,6D,69,6C,79,3A,22,54,69,6D,65,73,20,4E,65,77,20,52,6F,6D,61,6E,22,3B,0D,0A,09,6D,73,6F,2D,62,69,64,69,2D,74,68,65,6D,65,2D,66,6F,6E,74,3A,6D,69,6E,6F,72,2D,62,69,64,69,3B,0D,0A,09,6D,73,6F,2D,66,6F,6E,74,2D,6B,65,72,6E,69,6E,67,3A,31,2E,30,70,74,3B,0D,0A,09,6D,73,6F,2D,6C,69,67,61,74,75,72,65,73,3A,73,74,61,6E,64,61,72,64,63,6F,6E,74,65,78,74,75,61,6C,3B,0D,0A,09,6D,73,6F,2D,66,61,72,65,61,73,74,2D,6C,61,6E,67,75,61,67,65,3A,45,4E,2D,55,53,3B,7D,0D,0A,2D,2D,3E,0D,0A,3C,2F,73,74,79,6C,65,3E,0D,0A,3C,2F,68,65,61,64,3E,0D,0A,0D,0A,3C,2F,68,74,6D,6C,3E,0D,0A"
$registryPath = 'HKCU:\SOFTWARE\Microsoft\Office\16.0\Common\mailsettings'
$Name1Simple = "ComposeFontSimple"
$Name1Complex = "ComposeFontComplex"
$Name2Simple = "ReplyFontSimple"
$Name2Complex = "ReplyFontComplex"
$Name3Simple = "TextFontSimple"
$Name3Complex = "TextFontComplex"
$hexSimple = $ValueSimple.Split(',') | % { "0x$_"}
$hexComposeComplex = $ValueComposeComplex.Split(',') | % { "0x$_"}
$hexReplyComplex = $ValueReplyComplex.Split(',') | % { "0x$_"}
$hexTextComplex = $ValueTextComplex.Split(',') | % { "0x$_"}
IF(!(Test-Path $registryPath))
{
New-Item -Path $registryPath -Force | Out-Null
New-ItemProperty -Path $registryPath -Name $Name1Simple -Value ([byte[]]$hexSimple) -PropertyType Binary -Force
New-ItemProperty -Path $registryPath -Name $Name2Simple -Value ([byte[]]$hexSimple) -PropertyType Binary -Force
New-ItemProperty -Path $registryPath -Name $Name3Simple -Value ([byte[]]$hexSimple) -PropertyType Binary -Force
New-ItemProperty -Path $registryPath -Name $Name1Complex -Value ([byte[]]$hexComposeComplex) -PropertyType Binary -Force
New-ItemProperty -Path $registryPath -Name $Name2Complex -Value ([byte[]]$hexReplyComplex) -PropertyType Binary -Force
New-ItemProperty -Path $registryPath -Name $Name3Complex -Value ([byte[]]$hexTextComplex) -PropertyType Binary -Force
}
ELSE {
Set-ItemProperty -Path $registryPath -Name $Name1Simple -Value ([byte[]]$hexSimple) -Force
Set-ItemProperty -Path $registryPath -Name $Name2Simple -Value ([byte[]]$hexSimple) -Force
Set-ItemProperty -Path $registryPath -Name $Name3Simple -Value ([byte[]]$hexSimple) -Force
Set-ItemProperty -Path $registryPath -Name $Name1Complex -Value ([byte[]]$hexComposeComplex) -Force
Set-ItemProperty -Path $registryPath -Name $Name2Complex -Value ([byte[]]$hexReplyComplex) -Force
Set-ItemProperty -Path $registryPath -Name $Name3Complex -Value ([byte[]]$hexTextComplex) -Force
}
7. Create the Detect.ps1, these settings should match what has been set in Install.ps1.
$Path = "registry::HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Common\mailsettings"
$Name1 = "ReplyFontComplex"
$Name2 = "ComposeFontComplex"
$Value1 = "3C,68,74,6D,6C,3E,0D,0A,0D,0A,3C,68,65,61,64,3E,0D,0A,3C,73,74,79,6C,65,3E,0D,0A,0D,0A,20,2F,2A,20,53,74,79,6C,65,20,44,65,66,69,6E,69,74,69,6F,6E,73,20,2A,2F,0D,0A,20,73,70,61,6E,2E,50,65,72,73,6F,6E,61,6C,52,65,70,6C,79,53,74,79,6C,65,31,0D,0A,09,7B,6D,73,6F,2D,73,74,79,6C,65,2D,6E,61,6D,65,3A,22,50,65,72,73,6F,6E,61,6C,20,52,65,70,6C,79,20,53,74,79,6C,65,31,22,3B,0D,0A,09,6D,73,6F,2D,73,74,79,6C,65,2D,74,79,70,65,3A,70,65,72,73,6F,6E,61,6C,2D,72,65,70,6C,79,3B,0D,0A,09,6D,73,6F,2D,73,74,79,6C,65,2D,6E,6F,73,68,6F,77,3A,79,65,73,3B,0D,0A,09,6D,73,6F,2D,73,74,79,6C,65,2D,75,6E,68,69,64,65,3A,6E,6F,3B,0D,0A,09,6D,73,6F,2D,61,6E,73,69,2D,66,6F,6E,74,2D,73,69,7A,65,3A,31,30,2E,30,70,74,3B,0D,0A,09,6D,73,6F,2D,62,69,64,69,2D,66,6F,6E,74,2D,73,69,7A,65,3A,31,31,2E,30,70,74,3B,0D,0A,09,66,6F,6E,74,2D,66,61,6D,69,6C,79,3A,22,53,65,67,6F,65,20,55,49,22,2C,73,61,6E,73,2D,73,65,72,69,66,3B,0D,0A,09,6D,73,6F,2D,61,73,63,69,69,2D,66,6F,6E,74,2D,66,61,6D,69,6C,79,3A,22,53,65,67,6F,65,20,55,49,22,3B,0D,0A,09,6D,73,6F,2D,68,61,6E,73,69,2D,66,6F,6E,74,2D,66,61,6D,69,6C,79,3A,22,53,65,67,6F,65,20,55,49,22,3B,0D,0A,09,6D,73,6F,2D,62,69,64,69,2D,66,6F,6E,74,2D,66,61,6D,69,6C,79,3A,22,54,69,6D,65,73,20,4E,65,77,20,52,6F,6D,61,6E,22,3B,0D,0A,09,6D,73,6F,2D,62,69,64,69,2D,74,68,65,6D,65,2D,66,6F,6E,74,3A,6D,69,6E,6F,72,2D,62,69,64,69,3B,0D,0A,09,63,6F,6C,6F,72,3A,77,69,6E,64,6F,77,74,65,78,74,3B,7D,0D,0A,2D,2D,3E,0D,0A,3C,2F,73,74,79,6C,65,3E,0D,0A,3C,2F,68,65,61,64,3E,0D,0A,0D,0A,3C,2F,68,74,6D,6C,3E,0D,0A"
$Value2 = "3C,68,74,6D,6C,3E,0D,0A,0D,0A,3C,68,65,61,64,3E,0D,0A,3C,73,74,79,6C,65,3E,0D,0A,0D,0A,20,2F,2A,20,53,74,79,6C,65,20,44,65,66,69,6E,69,74,69,6F,6E,73,20,2A,2F,0D,0A,20,73,70,61,6E,2E,50,65,72,73,6F,6E,61,6C,43,6F,6D,70,6F,73,65,53,74,79,6C,65,0D,0A,09,7B,6D,73,6F,2D,73,74,79,6C,65,2D,6E,61,6D,65,3A,22,50,65,72,73,6F,6E,61,6C,20,43,6F,6D,70,6F,73,65,20,53,74,79,6C,65,22,3B,0D,0A,09,6D,73,6F,2D,73,74,79,6C,65,2D,74,79,70,65,3A,70,65,72,73,6F,6E,61,6C,2D,63,6F,6D,70,6F,73,65,3B,0D,0A,09,6D,73,6F,2D,73,74,79,6C,65,2D,6E,6F,73,68,6F,77,3A,79,65,73,3B,0D,0A,09,6D,73,6F,2D,73,74,79,6C,65,2D,75,6E,68,69,64,65,3A,6E,6F,3B,0D,0A,09,6D,73,6F,2D,61,6E,73,69,2D,66,6F,6E,74,2D,73,69,7A,65,3A,31,30,2E,30,70,74,3B,0D,0A,09,6D,73,6F,2D,62,69,64,69,2D,66,6F,6E,74,2D,73,69,7A,65,3A,31,31,2E,30,70,74,3B,0D,0A,09,66,6F,6E,74,2D,66,61,6D,69,6C,79,3A,22,53,65,67,6F,65,20,55,49,22,2C,73,61,6E,73,2D,73,65,72,69,66,3B,0D,0A,09,6D,73,6F,2D,61,73,63,69,69,2D,66,6F,6E,74,2D,66,61,6D,69,6C,79,3A,22,53,65,67,6F,65,20,55,49,22,3B,0D,0A,09,6D,73,6F,2D,68,61,6E,73,69,2D,66,6F,6E,74,2D,66,61,6D,69,6C,79,3A,22,53,65,67,6F,65,20,55,49,22,3B,0D,0A,09,6D,73,6F,2D,62,69,64,69,2D,66,6F,6E,74,2D,66,61,6D,69,6C,79,3A,22,54,69,6D,65,73,20,4E,65,77,20,52,6F,6D,61,6E,22,3B,0D,0A,09,6D,73,6F,2D,62,69,64,69,2D,74,68,65,6D,65,2D,66,6F,6E,74,3A,6D,69,6E,6F,72,2D,62,69,64,69,3B,0D,0A,09,63,6F,6C,6F,72,3A,77,69,6E,64,6F,77,74,65,78,74,3B,7D,0D,0A,2D,2D,3E,0D,0A,3C,2F,73,74,79,6C,65,3E,0D,0A,3C,2F,68,65,61,64,3E,0D,0A,0D,0A,3C,2F,68,74,6D,6C,3E,0D,0A"
$Output = "Detected"
$Registry1 = (Get-ItemProperty -Path $Path -Name $Name1 -ErrorAction Stop | Select-Object -ExpandProperty $Name1 | ForEach-Object { '{0:X2}' -f $_ }) -join ','
$Registry2 = (Get-ItemProperty -Path $Path -Name $Name2 -ErrorAction Stop | Select-Object -ExpandProperty $Name2 | ForEach-Object { '{0:X2}' -f $_ }) -join ','
If ($Registry1 -eq $Value1 -and $Registry2 -eq $Value2){
$Output}
8. Package both PowerShell scripts with Win32 App Packaging Tool.
9. Navigate to https://intune.microsoft.com/ then go to Apps then By platform: Windows then select Add then select App type: Windows app (Win32) then upload the converted .intunewin format.
Then enter:
Name: Set Segoe UI 10 Fonts for Outlook
Description: Set Segoe UI 10 Fonts for Outlook
Publisher: Devicie
Then select Next.
10. Under Program, where the following is configured.
Install command: %windir%\sysnative\windowspowershell\v1.0\powershell.exe -executionPolicy bypass -windowstyle hidden -file .\Install.ps1
Uninstall command: nouninstallcmd
Install behaviour: User
Then select Next.
11. Under Requirements, select the following:
Operating system architecture: 64-bit
Minimum operating system: Windows 10 1903
Then select Next.
12. Under Detection rules, select the following:
Rules format: Use a custom detection script (Upload a custom detection script).
Script file: Detect.ps1
Run script as 32-bit process on 64-bit clients: No
Enforce script signature check and run script silently: No
Then select Next.
13. Under Dependencies, leave as default, then select Next.
14. Under Supersedence, leave as default, then select Next.
15. Under Assignments, select the required groups then select Next.
16. Under Review + create, review the settings then select Next.
17. This will then setup existing or new Outlook templates with using the font: Segoe with Size 10.