Microsoft Entra External ID Authentication in Power Pages | Complete Authentication Setup Guide

๐Ÿ” In this step-by-step tutorial, learn how to configure Microsoft Entra External ID as an authentication provider in Microsoft Power Pages โ€” the modern replacement for Azure AD B2C.

Microsoft has launched Microsoft Entra External ID (formerly known as Azure Active Directory B2C) as a new, streamlined way to handle external user sign-up and login for your Power Pages portals. Unlike the older B2C setup, Entra External ID handles your entire user flow โ€” sign-up, sign-in, password reset โ€” all in one place. This makes it significantly easier for Power Platform developers and admins.

โฑ WHAT YOU'LL LEARN:
โœ… What is Microsoft Entra External ID and how it differs from Azure AD B2C
โœ… How to create a new External Tenant in Microsoft Entra Admin Center
โœ… How to register an Azure AD application in the external tenant
โœ… How to enable Access Tokens and ID Tokens for authentication
โœ… How to create a User Flow (Sign-up / Sign-in) with OTP or Password
โœ… How to link the application to the User Flow
โœ… How to configure Client ID, Authority URL, and Metadata Address in Power Pages
โœ… How to test external user registration and login end-to-end
โœ… How Contact mapping works with authenticated external users

๐Ÿ”— RESOURCES MENTIONED:
๐Ÿ“Œ Microsoft Entra Admin Center: https://entra.microsoft.com
๐Ÿ“Œ Power Pages Docs - Entra External ID: https://learn.microsoft.com/en-us/power-pages/security/authentication/entra-external-id
๐Ÿ“Œ Azure AD B2C Full Setup Video: https://youtu.be/tQFGMH7RrMI?si=FSVJwzc8JpvMMUgs

๐Ÿ’ก WHY MICROSOFT ENTRA EXTERNAL ID OVER AZURE B2C?
Azure AD B2C required a lot of manual user flow configuration. With Microsoft Entra External ID:
- User flow covers sign-up, sign-in, and password reset automatically
- Low-code setup directly from Power Pages Studio
- Supports MFA and social identity providers (Google, Facebook)
- Better brand customization for sign-in pages
- Built-in user analytics


โฑ CHAPTERS WITH TIMESTAMPS
00:00 Introduction โ€“ What is Microsoft Entra External ID?
00:58 Overview of Authentication Options in Power Pages (B2B, B2C, Entra External ID)
01:14 Starting the Configuration in Power Pages Identity Provider
02:00 Step 1 โ€“ Creating a New External Tenant in Entra Admin Center
03:30 Setting Up Tenant Name, Domain & Subscription
05:00 Waiting for Tenant Creation (& What Comes Next)
05:30 Step 2 โ€“ Registering an App in the External Tenant
07:00 Copying Client ID and Tenant ID to Notepad
08:30 Enabling Access Tokens and ID Tokens
09:10 Granting Admin Consent on API Permissions
10:01 Step 3 โ€“ Creating a User Flow (Sign-up / Sign-in)
11:00 Configuring OTP vs Password Authentication
12:00 Selecting User Attributes to Collect at Sign-up
13:30 User Flow Created Successfully
14:03 Step 4 โ€“ Attaching App Registration to User Flow
15:00 Back to Power Pages โ€“ All 4 Steps Complete
16:01 Configuring Client ID, Authority URL & Metadata Address
17:30 Optional Settings โ€“ Logout URL & Contact Mapping
18:00 Restarting the Power Pages Site
19:00 Channel Info โ€“ Premium Courses & Live Training
21:30 Testing: External User Registration with OTP
22:01 Entering Name, Email & Verifying OTP Code
23:02 Updating Profile & Contact Record in Power Pages
24:00 Verifying Contact Record & Web Authentication in Dataverse
24:30 Wrap Up โ€“ Entra External ID vs Azure B2C Summary

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