Office 365 Email Integration Demo Application

Objective: The goal of this demo application is to showcase the process of connecting an Office 365 mailbox to an application using automated Azure app registration and Microsoft Graph API. The demo will be built as a simple console application with a frontend and backend to demonstrate key concepts, which will later be integrated into a larger production system. Technology Stack: Frontend: Angular (or static HTML files for simplicity) Backend: .NET 8.0 Functionality Overview User Input: The application will display a simple UI with an input field where the user can provide the email address of the Office 365 mailbox to be connected. Automated Azure App Registration: The application will include functionality to automate the app registration process in Azure Active Directory (Azure AD) via Azure Management API, eliminating the need for the user to manually configure app registrations in the Azure portal. When the user clicks a button, the app will initiate the registration process and prompt the user (as a Tenant Administrator) to sign in and authorize the app. OAuth 2.0 Authentication: Upon clicking the "Connect to Office 365" button, the application will guide the user through the OAuth 2.0 flow using Microsoft's Identity Platform (MSAL). The user will authenticate as a Tenant Admin, and relevant OAuth 2.0 scopes such as [login to view URL] and [login to view URL] will be requested. The access token obtained will be used to interact with the user's Office 365 mailbox, though no real persistence of authentication data is required for the demo. Microsoft Graph API Integration: Once authenticated, the application will use the Microsoft Graph API to fetch and display a list of email subjects (message headers) from the root folder of the connected mailbox. This will be presented in a simple table on the frontend after a successful connection. Backend Implementation The backend will be developed in .NET 8.0 and will handle the following: Managing the automated app registration with Azure AD using Azure Management API. Handling the OAuth 2.0 flow and retrieving the access token via MSAL. Using the Microsoft Graph API to query and retrieve email metadata (subjects) from the connected Office 365 mailbox. Frontend Implementation The frontend will be responsible for: Providing a simple user interface with a text input for the email address and a button to trigger the connection workflow. Displaying the retrieved email subjects from the user's mailbox after successful authentication. Authentication & Authorization The demo will demonstrate the tenant administrator's role in approving the connection to Office 365. While authentication information (like tokens) will be shown, they will not be persisted in this demo but will be illustrated clearly in the code for future reference on how to handle storage securely. Requirements Azure Active Directory tenant with Office 365 accounts. A registered Office 365 account with Tenant Admin privileges for testing the app registration and OAuth flow. Application permissions for accessing the Microsoft Graph API ([login to view URL], [login to view URL]). Key Points This demo will serve as a blueprint for connecting applications to Office 365, automating app registration, and accessing emails programmatically using modern authentication mechanisms. The automated Azure app registration will simplify the setup for administrators, reducing the need for manual configurations in Azure. The OAuth 2.0 integration will ensure secure access to the Office 365 mailbox with clear flows for authentication and permission granting. Future Considerations While the demo application will not store authentication tokens or user information, a section in the code will highlight where and how such data should be securely stored for production environments. The integration of this demo into a larger application would include features like secure token storage, error handling, and extended API functionality for further interaction with Office 365 (e.g., sending emails, managing folders).

Project ID: 38660662