AI Agents for Outlook: Microsoft 365 Copilot and Connected Agents

Inside Outlook, Copilot drafts and rewrites replies in your voice, shortens or changes the tone of a message, summarizes a long thread so you can catch up in a sentence or two, and pulls together what you missed while you were out. It reaches across your Microsoft 365 data, so it can reference a file in SharePoint or a recent Teams chat when it drafts. For a person clearing their own inbox, it is genuinely useful and saves real time.

The pricing is per seat and sits on top of a base plan. Microsoft 365 Copilot is $30 per user a month for enterprise and unlocks Copilot in Outlook, Word, Excel, Teams, and prebuilt agents like Researcher and Analyst; smaller teams can use Copilot Business, which runs about $21 per user a month after its introductory period. Either way you also need the qualifying Microsoft 365 base license underneath. And when you want an agent that acts on its own rather than assists a person, you build it in Copilot Studio, which bills separately on Copilot Credits: $0.01 per credit pay-as-you-go, or a 25,000-credit pack for $200 a month. That is a sensible model for a Microsoft-centric shop, but for a team drowning in a shared support or sales mailbox, the per-seat assistant plus a metered custom agent is a different shape of cost than a single flat-rate agent that owns the queue.

A marketplace agent connects to Outlook through the Microsoft Graph API with scoped, revocable access, and it takes over the repetitive inbox work. It reads each incoming message, categorizes and flags it, routes it to the right owner, and drafts a reply from your approved answers, sending automatically for the simple cases and holding the rest for a person. When a message carries an order number, an invoice, or a support detail, the agent pulls it into your CRM or help desk so the record updates without anyone rekeying it, and it follows up on threads that go quiet. Because it runs on a flat subscription, a spike in volume does not change the cost.

This is where a connected agent sits neatly next to Copilot. Copilot helps a person write a better single reply; the connected agent handles hundreds of replies and keeps your other systems in step. Teams that live in Outlook and the calendar often pair it with an AI assistant that schedules meetings and files documents so the routine office work is covered too. If the mailbox is mostly support, a connected AI agent for customer service keeps tickets and email in sync; if it is mostly sales, our AI agents for sales page covers reply and follow-up automation in more depth.

Email is how customers and prospects hear from you, so the default is cautious. The agent runs low-risk actions on its own, categorizing, routing, and drafting, and you choose which replies send automatically (order confirmations, simple FAQs) and which wait for a person (refunds, complaints, anything with a dollar figure or a commitment). You widen what it sends on its own as you watch it work your real inbox, one message type at a time.

Every action the agent takes is logged against the thread, so a manager reviewing the mailbox sees exactly what went out and why. Every agent listed on the marketplace is reviewed and security-scanned before it goes live, and you can see exactly what it does and which permissions it needs before you connect it to a live Outlook account. Compare the email and support agents side by side in the AI agent store, and read how to vet an AI agent before you grant mailbox access.