AzureADGraphAPITest.ps1

$ErrorActionPreference = 'Stop'

function Main
{
    Use-NuGetPackage -PackageId Microsoft.IdentityModel.Clients.ActiveDirectory -Version 1.0.3 -Verbose #Require PSNuGet <https://github.com/altrive/PSNuGet>

    #Azure AD native client application settings
    $authority = 'https://login.windows.net/{0}.onmicrosoft.com' -f 'altrive' #Set AzureAD tenant
    $clientId = '[Native Client Application ClientID]' #Native Client Application ClientID
    $redirectUri = [Uri] 'http://localhost' #Dummy URL

    #varidate authorith:$false
    $authCtx = New-Object Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationContext($authority)

    #Show login dialog and get token for AzureAD graph api 
    $token = $authCtx.AcquireToken("https://graph.windows.net", $clientId, $redirectUri)

    $header = $token.CreateAuthorizationHeader()
    $uri = [string]::Format('https://graph.windows.net/{0}/users?api-version=2013-11-08', $token.TenantId)

    #Query AzureAD graph API
    $result = Invoke-RestMethod -Method Get -Uri $uri -Headers @{ 'Authorization' = $header; 'Content-Type' = 'application/json' }

    return $result.value
}

Main