Power Automate is the core Microsoft 365 service for creating automated workflows, including those for approvals. It allows users to build flows that trigger on specific events and route information for review. Microsoft Teams serves as a central hub for collaboration and integrates an "Approvals" app. This app allows managers to receive, track, and respond to approval requests generated by Power Automate directly within the Teams interface, streamlining the entire process. Together, Power Automate builds the workflow, and Teams provides a primary access point for managers to action them.

B. Microsoft Excel: Excel is a spreadsheet application designed for data analysis and calculation, not for creating or managing automated, cross-service approval workflows.

C. Yammer: Yammer is an enterprise social networking service for communication and community engagement, lacking the native functionality for building and managing formal approval workflows.

1. Microsoft Learn. "Overview of Power Automate." Power Automate Documentation. This document introduces Power Automate as the service to "create automated workflows between your favorite apps and services to synchronize files

get notifications

collect data

and more." The "Approvals" connector is a key feature.

2. Microsoft Learn. "What is Approvals? - Microsoft Teams." Microsoft Teams Documentation. States

"Approvals in Microsoft Teams is a native Teams application that lets you easily create

manage

and share approvals from your hub for teamwork... You can create an approval flow from the Approvals app or from a chat or channel conversation. You can also connect the Approvals app with Power Automate."

3. Microsoft Learn. "Create approval flows with Power Automate." Power Automate Documentation. Section: "Create an approval flow." This guide explicitly details how to use Power Automate to "create an approval workflow" and how these requests can be managed via email or the Approvals app in Microsoft Teams.