Msal Custom Login Page

How To Articles

Hey there! Today I want to talk to you about something that has been on my mind lately: the MSAL (Microsoft Authentication Library) custom login page. As a developer, I know how important it is to provide a seamless and personalized user experience when it comes to authentication. So, let’s dive into the details of creating a custom login page with the MSAL library.

First things first, let’s talk about what MSAL is. MSAL is a library provided by Microsoft that allows developers to authenticate users and acquire tokens to access Microsoft APIs such as Microsoft Graph, Azure Active Directory, and more. It provides a secure and efficient way to handle authentication in your applications.

Now, why would you want to create a custom login page? Well, the default login page provided by MSAL may not always fit the requirements of your application. By creating a custom login page, you have full control over the look and feel of the authentication process, allowing you to provide a more consistent user experience and incorporate your own branding.

So, how do we go about creating a custom login page with MSAL? First, we need to include the MSAL library in our project. You can either download it from the official Microsoft GitHub repository or include it through a CDN. Once you have the library included, you can start building your custom login page.

To start, you’ll need to create an HTML form that collects the user’s credentials. You can add input fields for the username and password, and maybe even include additional fields for things like multi-factor authentication or remember me options. Make sure to add the necessary event handlers to handle form submission and any other required functionality.

Once the form is set up, you’ll need to handle the authentication process using the MSAL library. This involves creating an instance of the UserAgentApplication class provided by MSAL and setting up the necessary configuration options. You’ll need to provide your client ID, redirect URI, and any other required parameters.

With the UserAgentApplication instance set up, you can now use the library’s methods to acquire tokens and authenticate the user. You can call the loginPopup or loginRedirect methods to initiate the authentication process. These methods will open a popup or redirect the user to the Microsoft login page, where they can enter their credentials and complete the authentication process.

Once the user is authenticated, you can use the acquired tokens to access Microsoft APIs on behalf of the user. You can also use the getUser method provided by MSAL to retrieve information about the authenticated user, such as their username or email address, and customize the user experience based on this information.

In conclusion, creating a custom login page with MSAL allows you to provide a more personalized and consistent user experience in your applications. By leveraging the power of MSAL, you can create a seamless authentication process that aligns with your application’s branding and requirements. So go ahead and give it a try, and let me know how it goes!


In this article, we explored the world of MSAL custom login pages. We learned about the MSAL library and why creating a custom login page can be beneficial for your application. We also discussed the steps involved in creating a custom login page using MSAL, including setting up the HTML form, handling authentication with the UserAgentApplication class, and utilizing the acquired tokens for accessing Microsoft APIs. By following these steps, you can create a seamless and personalized authentication experience for your users. So go ahead and start building that custom login page, and take your application to the next level!