Modify the Post-Sign-In Redirect URL: In the Power Pages Site Settings, add or update the setting: Name: Authentication/OpenIdConnect/RedirectUri
Value: URL of your Power App, e.g., https://apps.powerapps.com/play/...
Alternatively, if you are using custom logic for authentication: Handle the redirection in the sign-in completion flow by sending users to the Power App URL.
https://apps.powerapps.com/play/...?userId=12345
In the Power App, retrieve and process these parameters using the Param()
function in Power Apps.