By default, there is an Intune device configuration property that can set a devices wallpaper (Profile Type: Device Restrictions > Personalization) BUT this is only applicable on devices running Windows 10 Enterprise and Windows 10 Education. Luckily, using PowerShell we can download a image from the web, save it locally, and set it as our users wallpapers.

First we need to create our PowerShell script. In PowerShell ISE I created the following script and saved it to my local machine

$RegKeyPath = "HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\PersonalizationCSP"


$DesktopPath = "DesktopImagePath"
$DesktopStatus = "DesktopImageStatus"
$DesktopUrl = "DesktopImageUrl"

$StatusValue = "1"


$url = "https://www.thelazyadministrator.com/wp-content/uploads/2019/07/nicewall.jpg"
$DesktopImageValue = "C:\MDM\wallpaper_LazyAdmin.jpg"
$directory = "C:\MDM\"


If ((Test-Path -Path $directory) -eq $false)
{
	New-Item -Path $directory -ItemType directory
}

$wc = New-Object System.Net.WebClient
$wc.DownloadFile($url, $DesktopImageValue)



if (!(Test-Path $RegKeyPath))
{
	Write-Host "Creating registry path $($RegKeyPath)."
	New-Item -Path $RegKeyPath -Force | Out-Null
}


New-ItemProperty -Path $RegKeyPath -Name $DesktopStatus -Value $StatusValue -PropertyType DWORD -Force |