Walkthrough Customising Entra External ID for Power Pages

Introduction

Are you using Entra External ID with Power Pages and want to customise the login experience? This guide walks through exactly that — applying your own branding, images, colours, and layout to the Entra login screen for external users.

This is especially useful for creating a polished, consistent experience when your users are accessing Power Pages from outside your organisation.

If you’re new to setting up Entra External ID for Power Pages, I’ve also got a full video walkthrough on how to configure that — I’ll link it below.

What You’ll Learn

In this video and post, we explore:

• How to verify you’re in the correct Entra tenant for external ID customisation
• Where to find Company Branding settings in Microsoft Entra
• How to add:
  • Favicon
  • Background image
  • Custom page colours
  • Header and footer logos
  • Links for privacy and terms
• Common pitfalls (like image size limits)
• How to test your branding changes in a live Power Pages scenario

Why This Matters

The default login experience in Entra External ID works — but let’s face it — it’s pretty bland. For public-facing websites or citizen-facing portals, you want something that reinforces trust and shows attention to detail. Custom branding allows you to:

• Match your corporate style
• Reduce user confusion
• Deliver a consistent login experience from start to finish

Tips to Remember

• Images like background and logo must be under 300KB.
• You’ll need the Organizational Branding Administrator role (or higher).
• Don’t forget to test in the correct tenant — you’ll usually have a separate External tenant in Entra for this.
• Email templates are not controlled here — we’ll look at that in another post.

Final Thoughts

This small step makes a huge difference in how professional your solution feels to users. Whether it’s a public sector form, citizen portal, or partner landing page, getting your login screen branded properly is worth the effort.

Let me know if you have any questions or want a hand setting up your Entra branding!

🔗 Watch on YouTube: Walk through Power Pages with Entra External ID
🔧 Need help? Contact me via iantweedie.biz

Originally posted on TechTweedie, going beyond the low code, my home for all things Power Platform and low-code DevOps.