Public/Invoke-IntuneRestoreGroupPolicyConfiguration.ps1

function Invoke-IntuneRestoreGroupPolicyConfiguration {
    <#
    .SYNOPSIS
    Restore Intune Group Policy Configurations
     
    .DESCRIPTION
    Restore Intune Group Policy Configurations from JSON files per Group Policy Configuration Policy from the specified Path.
     
    .PARAMETER Path
    Root path where backup files are located, created with the Invoke-IntuneBackupGroupPolicyConfigurations function
     
    .EXAMPLE
    Invoke-IntuneRestoreGroupPolicyConfiguration -Path "C:\temp" -RestoreById $true
    #>

    
    [CmdletBinding()]
    param(
        [Parameter(Mandatory = $true)]
        [string]$Path,

        [Parameter(Mandatory = $false)]
        [ValidateSet("v1.0", "Beta")]
        [string]$ApiVersion = "Beta"
    )

    #Connect to MS-Graph if required
    if ($null -eq (Get-MgContext)) {
        connect-mggraph -scopes "DeviceManagementApps.ReadWrite.All, DeviceManagementConfiguration.ReadWrite.All, DeviceManagementServiceConfig.ReadWrite.All, DeviceManagementManagedDevices.ReadWrite.All" 
    }

    # Get all Group Policy Configurations
    $groupPolicyConfigurations = Get-ChildItem -Path "$Path\Administrative Templates" -File -ErrorAction SilentlyContinue

    foreach ($groupPolicyConfiguration in $groupPolicyConfigurations) {
        $groupPolicyConfigurationContent = Get-Content -LiteralPath $groupPolicyConfiguration.FullName -Raw | ConvertFrom-Json
        $groupPolicyConfigurationDisplayName = $groupPolicyConfiguration.BaseName
        
        # Restore the Group Policy Configuration
        try {
            $groupPolicyConfigurationRequestBody = @{
                displayName = $groupPolicyConfigurationDisplayName
            }
            $groupPolicyConfigurationObject = Invoke-MgGraphRequest -Method POST -Uri "$apiVersion/deviceManagement/groupPolicyConfigurations" -Body ($groupPolicyConfigurationRequestBody | ConvertTo-Json).toString() -ErrorAction Stop
            [PSCustomObject]@{
                "Action" = "Restore"
                "Type"   = "Administrative Template"
                "Name"   = $groupPolicyConfigurationObject.displayName
                "Path"   = "Administrative Templates\$($groupPolicyConfiguration.Name)"
            }

            foreach ($groupPolicyConfigurationSetting in $groupPolicyConfigurationContent) {
                $groupPolicyDefinitionValue = Invoke-MgGraphRequest -Method POST -Uri "$apiVersion/deviceManagement/groupPolicyConfigurations/$($groupPolicyConfigurationObject.id)/definitionValues" -Body ($groupPolicyConfigurationSetting | ConvertTo-Json -Depth 100).toString() -ErrorAction Stop
                $groupPolicyDefinition = Invoke-MgGraphRequest -Method GET -Uri "$apiVersion/deviceManagement/groupPolicyConfigurations/$($groupPolicyConfigurationObject.id)/definitionValues/$($groupPolicyDefinitionValue.id)/definition"
                [PSCustomObject]@{
                    "Action" = "Restore"
                    "Type"   = "Administrative Template Setting"
                    "Name"   = $groupPolicyDefinition.displayName
                    "Path"   = "Administrative Templates\$($groupPolicyConfiguration.Name)"
                }
            }
        }
        catch {
            Write-Verbose "$($groupPolicyConfiguration.BaseName) - Failed to restore Group Policy Configuration and/or (one or more) Settings" -Verbose
            Write-Error $_ -ErrorAction Continue
        }
    }
}