You can cancel an approval in Power Automate by using a single flow action. This ability is not included in the standard approvals actions. However, you can invoke an HTTP request to call the Microsoft Teams approvals API and cancel the request. To cancel an approval, you need to choose an approval that is in the requested status. Then, get the approval ID for the approval to be cancelled. Make a connection to Microsoft Teams approvals using the "HTTP With Microsoft Entra ID (Pre-authorized) – Invoke An HTTP Request" action. Fill in the flow action with the necessary values to cancel the approval request. Finally, save the flow and give it a test run.
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