Duplicate the IDs between two IntuneManager JSON exports

DuplicateIntuneManagerIds.ps1

param(
    [Parameter(Mandatory = $true,
        Position = 0,
        HelpMessage = "Path to exported files from the tenant.")]
    [ValidateNotNullOrEmpty()]
    [string]
    $TenantExportPath,

    [Parameter(Mandatory = $true,
        Position = 1,
        HelpMessage = "Path to the policies you want to compare with.")]
    [ValidateNotNullOrEmpty()]
    [string]
    $BaselinePath
)

$tenantExportFiles = Get-ChildItem $TenantExportPath -Recurse -Name
$baselineFiles = Get-ChildItem $BaselinePath -Recurse -Name

$diff = Compare-Object -ReferenceObject $tenantExportFiles -DifferenceObject $baselineFiles -ExcludeDifferent

foreach ($file in $diff) {
    if ($file.InputObject.EndsWith(".json") -eq $false) {
        continue
    }
    
    $baselineFilePath = Join-Path -Path $BaselinePath -ChildPath $file.InputObject
    $baselineObj = Get-Content $baselineFilePath | ConvertFrom-Json

    $tenantFilePath = Join-Path -Path $TenantExportPath -ChildPath $file.InputObject
    $tenantObj = Get-Content $tenantFilePath | ConvertFrom-Json

    $tenantObj.id = $baselineObj.id

    $tenantObj | ConvertTo-Json -Depth 100 | Out-File -FilePath $tenantFilePath

    Write-Host "Set $($file.InputObject) as $($baselineObj.id)"
}