Powershell MS Graph API-ManagedDevices获取范围

我的目标是创建一个可调度的PowerShell脚本，该脚本将报告最近注册的设备。我已经创建了应用程序并授予了一些权限

 $OauthTokenEndpoint = 'https://login.microsoftonline.com/tenantid/oauth2/token'

$OauthRequest = @{
    grant_type="client_credentials"
    client_id = "clientidguid"
    client_secret = "clientidsecret"
    resource = "https://graph.microsoft.com"
    scope="DeviceManagementManagedDevices.Read.All"
}

$AuthResponse = Invoke-RestMethod -Uri $OauthTokenEndpoint -Method Post -ContentType application/x-www-form-urlencoded -Body $OauthRequest
$Token = $authresponse.access_token

#this query completes successfully
$Success = Invoke-restmethod -uri https://graph.microsoft.com/v1.0/users/username@domain.com/ownedDevices  -Headers @{Authorization = "Bearer $Token"}  -method Get

#this query fails with 401 unauthorised
$401Error = Invoke-RestMethod -Headers @{Authorization = "Bearer $Token"} -uri  "https://graph.microsoft.com/beta/managedDevices/deviceguid?`$select=hardwareInformation" -Method GET

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我认为我的问题在于我没有或无法向我的应用程序授予DeviceManagement ManagedDevices.Read.All作用域权限。这个API与Graph Explorer配合使用，我有一个交互式版本的脚本，它使用了有效的委托权限。如何允许我的应用程序访问ManagedDevices API端点，以便以非交互方式使用它。

从Microsoft收到的信息表明，当前不支持使用没有用户凭据的Intune Graph API