Meta Description: Learn how to replace SMTP with Microsoft Graph API in D365FO. A step-by-step guide to Azure App Registration, API permissions (Mail.Send), and Email Parameter setup. Introduction With Microsoft moving towards modern authentication, the traditional SMTP setup in Dynamics 365 Finance & Operations is being phased out. Using Microsoft Graph API is now the standard for sending secure, reliable emails. In this post, I will walk you through the technical configuration required to bridge Azure Active Directory (Entra ID) and D365FO. Phase 1: Azure Portal Configuration The first step is creating a secure entry point in the Azure Portal. (You must have admin rights on Azure Portal ) App Registration: Create a new registration named DemoMails . (Write your own name) Credentials: Note down the Application (Client) ID API Permissions: This is the most crucial part. You must add Application Permissions for Mail.Send under Microsoft Graph. Crucial Step: Don't forget...