Power Pages Authentication Key - Full Explanation

Power Pages Authentication Key – Full Explanation

Power Pages uses secure Server-to-Server (S2S) authentication to communicate with Microsoft Dataverse. When you create a Power Pages site, the system automatically generates an Azure AD Application along with an Authentication Certificate Key. This key enables the website to fetch and send Dataverse data securely.

Why the Authentication Key Must Be Updated Every Year

Each authentication key has a fixed expiration period. When it expires, the website can no longer authenticate with Dataverse. Microsoft enforces this expiration for higher security, preventing long-term reuse of certificates.

  • Ensures continued security by rotating encryption certificates
  • Prevents sudden outages caused by expired authentication keys
  • Follows enterprise compliance and Microsoft best practices
  • Reduces risks from stolen or compromised keys

What Happens If the Key Expires

  • The website cannot request an access token from Azure AD
  • Forms, lists, and Dataverse connections fail instantly
  • Website cannot read or write Dataverse data
  • Users may see authentication or permission errors

Steps to Update (Rotate) the Authentication Key

  1. Open Power Platform Admin Center
  2. Select your environment
  3. Go to Resources → Power Pages sites
  4. Choose your website
  5. Open Manage Authentication Key
  6. Click Update Key
  7. A new authentication key will be generated and the expiry date will reset for one year.
Important Notes:
  • Rotate the key at least 30 days before expiry
  • Verify the new key before deleting the old one
  • Only admins with correct permissions can rotate keys
  • The website will restart during the process
  • New key is valid for 1 year
  • Process takes around 5–7 minutes
  • No other site settings or configurations are affected

Official Documentation Link

Power Pages - Manage Authentication Key

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