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2018-10-12T15:09:07+00:00

[…] Getting started with Graph API and PowerShell […]

2018-10-16T22:38:15+00:00

Great Post!
For some reason it was not working like that for me, i had to make 3 minor changes:

In the credential line I replaced this:
$AADCredential = New-Object “Microsoft.IdentityModel.Clients.ActiveDirectory.UserCredential” -ArgumentList $Office365Username,$SecurePassword
with this:
$AADCredential = New-Object “Microsoft.IdentityModel.Clients.ActiveDirectory.UserPasswordCredential” -ArgumentList $Office365Username,$SecurePassword

In the $authresult I changed this:

$authResult = $authContext.AcquireToken($resourceURI, $clientId,$AADCredential)

with this:
$authResult = [Microsoft.IdentityModel.Clients.ActiveDirectory.AuthenticationContextIntegratedAuthExtensions]::AcquireTokenAsync($authContext, $resourceURI, $clientid, $AADCredential);

and finally this:
$accessToken = $authResult.AccessToken

with:
$accessToken = $authResult.result.AccessToken

	# Azure AD OAuth User Token for Graph API
	# Get OAuth token for a AAD User (returned as $token)

	# Add required assemblies
	Add-Type -AssemblyName System.Web, PresentationFramework, PresentationCore

	# Application (client) ID, tenant ID and redirect URI
	$clientId = "<client id>"
	$tenantId = "<tenant id>"
	$redirectUri = "https://login.microsoftonline.com/common/oauth2/nativeclient"

	# Scope - Needs to include all permisions required separated with a space
	$scope = "User.Read.All Group.Read.All" # This is just an example set of permissions

	# Random State - state is included in response, if you want to verify response is valid
	$state = Get-Random

	# Encode scope to fit inside query string
	$scopeEncoded = [System.Web.HttpUtility]::UrlEncode($scope)

	# Redirect URI (encode it to fit inside query string)
	$redirectUriEncoded = [System.Web.HttpUtility]::UrlEncode($redirectUri)

	# Construct URI
	$uri = "https://login.microsoftonline.com/$tenantId/oauth2/v2.0/authorize?client_id=$clientId&response_type=code&redirect_uri=$redirectUriEncoded&response_mode=query&scope=$scopeEncoded&state=$state"

	# Create Window for User Sign-In
	$windowProperty = @{
	Width = 500
	Height = 700
	}

	$signInWindow = New-Object System.Windows.Window -Property $windowProperty

	# Create WebBrowser for Window
	$browserProperty = @{
	Width = 480
	Height = 680
	}

	$signInBrowser = New-Object System.Windows.Controls.WebBrowser -Property $browserProperty

	# Navigate Browser to sign-in page
	$signInBrowser.navigate($uri)

	# Create a condition to check after each page load
	$pageLoaded = {

	# Once a URL contains "code=*", close the Window
	if ($signInBrowser.Source -match "code=[^&]*") {

	# With the form closed and complete with the code, parse the query string

	$urlQueryString = [System.Uri]($signInBrowser.Source).Query
	$script:urlQueryValues = [System.Web.HttpUtility]::ParseQueryString($urlQueryString)

	$signInWindow.Close()

	}
	}

	# Add condition to document completed
	$signInBrowser.Add_LoadCompleted($pageLoaded)

	# Show Window
	$signInWindow.AddChild($signInBrowser)
	$signInWindow.ShowDialog()

	# Extract code from query string
	$authCode = $script:urlQueryValues.GetValues(($script:urlQueryValues.keys \| Where-Object { $_ -eq "code" }))

	if ($authCode) {

	# With Auth Code, start getting token

	# Construct URI
	$uri = "https://login.microsoftonline.com/$tenantId/oauth2/v2.0/token"

	# Construct Body
	$body = @{
	client_id = $clientId
	scope = $scope
	code = $authCode[0]
	redirect_uri = $redirectUri
	grant_type = "authorization_code"
	}

	# Get OAuth 2.0 Token
	$tokenRequest = Invoke-WebRequest -Method Post -Uri $uri -ContentType "application/x-www-form-urlencoded" -Body $body

	# Access Token
	$token = ($tokenRequest.Content \| ConvertFrom-Json).access_token

	}
	else {

	Write-Error "Unable to obtain Auth Code!"

	}

	# Azure AD OAuth Application Token for Graph API
	# Get OAuth token for a AAD Application (returned as $token)

	# Application (client) ID, tenant ID and secret
	$clientId = "<client id>"
	$tenantId = "<tenant id>"
	$clientSecret = '<secret>'

	# Construct URI
	$uri = "https://login.microsoftonline.com/$tenantId/oauth2/v2.0/token"

	# Construct Body
	$body = @{
	client_id = $clientId
	scope = "https://graph.microsoft.com/.default"
	client_secret = $clientSecret
	grant_type = "client_credentials"
	}

	# Get OAuth 2.0 Token
	$tokenRequest = Invoke-WebRequest -Method Post -Uri $uri -ContentType "application/x-www-form-urlencoded" -Body $body -UseBasicParsing

	# Access Token
	$token = ($tokenRequest.Content \| ConvertFrom-Json).access_token

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