Error when guest users approve or reject a request in the Approval Adaptive Card email

This article provides a workaround for an issue where guest users can't approve or reject an approval request directly from the approval card received in the email.

Symptoms

When a guest user receives an email to approve or reject an approval request, responding to the request results in this error message:

The remote endpoint returned an error HTTP 403. Please try again later.

Workaround

To work around this issue, go to the Power Automate portal to complete the action.