Uploaded December 2025 | Updated September 2026, 2 weeks ago
Are you tired of typing the same email replies over and over? In this video, I show you how to build a personal AI Auto-Reply Agent using the new Microsoft Copilot Workflow Agents.
In my previous video, I showed you how to build a complex customer service bot using the full power of Copilot Studio. While powerful, that method requires a lot of setup. Today, we are looking at the "Fast Lane." I’ll show you how to use the "Lite" version of Copilot agents to automate your inbox in under 5 minutes—no coding required.
We will build an agent that acts as your personal researcher: it reads your incoming emails, finds the answers on a specific website you choose, and writes a professional, formatted email response for you instantly.
⚠️ IMPORTANT REQUIREMENTS: To follow this tutorial, you currently need:
A commercial Microsoft 365 Copilot license.
Your IT Admin must have "Frontier" (Preview) features enabled on your tenant.
🛑 A NOTE ON SAFETY & LIMITATIONS: During the testing of this "Lite" builder, I found that it struggled to reliably read internal OneDrive documents (unlike the full Copilot Studio). For this reason, this demo focuses on Public Web Search which works flawlessly. Additionally, I highly recommend instructing your agent to "Create a Draft" rather than "Reply Automatically" to keep a human in the loop and avoid AI hallucinations.
In this video, you will learn:
The difference between Copilot Studio and Workflow Agents.
How to write a prompt that forces the AI to search a specific website for answers.
How to prevent "ugly" AI email formatting (No HTML vs. Plain Text).
Why "Draft Mode" is the safest way to start automating your business communications.
0:00 The "Email Grind" & The Solution
0:44 Copilot Studio vs. Workflow Agents (The Difference)
1:33 Adding Workflows Agent in M365 Copilot
2:08 Shaping your prompt
4:06 Save and test your workflow
5:59 Editing your workflow
8:54 Internal Files, Hallucinations & Safety
Are you tired of typing the same email replies over and over? In this video, I show you how to build a personal AI Auto-Reply Agent using the new Microsoft Copilot Workflow Agents.
In my previous video, I showed you how to build a complex customer service bot using the full power of Copilot Studio. While powerful, that method requires a lot of setup. Today, we are looking at the "Fast Lane." I’ll show you how to use the "Lite" version of Copilot agents to automate your inbox in under 5 minutes—no coding required.
We will build an agent that acts as your personal researcher: it reads your incoming emails, finds the answers on a specific website you choose, and writes a professional, formatted email response for you instantly.
⚠️ IMPORTANT REQUIREMENTS: To follow this tutorial, you currently need:
A commercial Microsoft 365 Copilot license.
Your IT Admin must have "Frontier" (Preview) features enabled on your tenant.
🛑 A NOTE ON SAFETY & LIMITATIONS: During the testing of this "Lite" builder, I found that it struggled to reliably read internal OneDrive documents (unlike the full Copilot Studio). For this reason, this demo focuses on Public Web Search which works flawlessly. Additionally, I highly recommend instructing your agent to "Create a Draft" rather than "Reply Automatically" to keep a human in the loop and avoid AI hallucinations.
In this video, you will learn:
The difference between Copilot Studio and Workflow Agents.
How to write a prompt that forces the AI to search a specific website for answers.
How to prevent "ugly" AI email formatting (No HTML vs. Plain Text).
Why "Draft Mode" is the safest way to start automating your business communications.
0:00 The "Email Grind" & The Solution
0:44 Copilot Studio vs. Workflow Agents (The Difference)
1:33 Adding Workflows Agent in M365 Copilot
2:08 Shaping your prompt
4:06 Save and test your workflow
5:59 Editing your workflow
8:54 Internal Files, Hallucinations & Safety
