Active Directory Authentication Library made easy

Let’s see how we can make the Active Directory authentication incredibly easy for your Xamarin projects.

To help you to speed up your Xamarin development, I’ve created a set of plugins, one of them is MTADAL. Thanks to this plugin you can authenticate users in your projects with a single line of code.

A couple of useful link you can find useful

Nuget link:\

Project website:

To report any issue:

And now let’s see how to integrate the plugin inside your Xamarin Forms solution.

Add the Active Directory Plugin

First of all we need to install the plugin. To do that, do a right-click on your solution and click on “Manage NuGet Packages for Solution…”

manage nuget

Manage the Nuget packages

Now search the package MarcTron.ADAL, click on it and remember to select all your projects (.Net Standard project + all the main application projects).

MTADAL Nuget package

The Plugin will take care to install for you also the Nuget package Microsoft.IdentityModel.Clients.ActiveDirectory so you need to accept the Microsoft License.

If everything worked as expected, you will see the version of the plugin next to each of the projects you have selected in the previous step.

Nuget package installed successfully

Now it’s time to try the plugin to see how easy it is.

Authenticate your users

Inside the Button_OnClicked method, you can see the only line of code you need to authenticate the user:

AuthenticationResult data = await MTADAL.Current.Authenticate(Authority, GraphResourceUri, ClientId, ReturnUri);
using System;
using MarcTron.Plugin.ADAL;
using Microsoft.IdentityModel.Clients.ActiveDirectory;
using Xamarin.Forms;

    public partial class MainPage : ContentPage
        public const string ClientId = "YOUR CLIENT ID";
        public static readonly string ReturnUri = "YOUR RETURN URI";
        public const string GraphResourceUri = "YOUR Graph Resource Uri";
        private const string AadInstance = "YOUR AAD Instance";
        private const string Tenant = "YOUR TENANT";
        public static readonly string Authority = $"{AadInstance}{Tenant}";

        public MainPage()

        private async void Button_OnClicked(object sender, EventArgs e)
            AuthenticationResult data = await MTADAL.Current.Authenticate(Authority, GraphResourceUri, ClientId, ReturnUri);

            if (data != null)
                await DisplayAlert("MTADAL", "Hello " + data.UserInfo.GivenName, "Ok");

Of course you need to set Authority, GraphResourceUri, ClientId, ReturnUriaccording to your Active Directory credentials.

If we run this simple code and we insert the correct email and password this is what we seeAuthentication completed! And with only a single line of code!


To use this plugin on Android, add the following line inside the OnCreate method of your MainActivity:


Add that line just after the Xamarin Forms initialization

Xamarin.Forms.Forms.Init(this, bundle);

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