Outlook integration · BetaBeta
An AI assistant for Outlook and Microsoft 365
If your company runs on Microsoft 365, Tessa reads Outlook just like Gmail: she picks out what matters, drafts the reply and sends nothing without you.
This connection is in beta: it works, but we are still testing it with real accounts.
Most AI tools assume you use Gmail
Plenty of small businesses run on Outlook because it came with their Office licences or a big client requires it. Yet many AI productivity tools take Google for granted.
The underlying problem is the same either way: too much email, little of it important, and replies you type over and over. Switching email provider isn’t a realistic fix.
How it works with Tessa
- 1
Connect your Microsoft account
From My connections, using Microsoft sign-in. Grant access to mail, calendar and files and Tessa starts reading.
- 2
Your inbox becomes tasks
Every email asking you for something shows up with a priority and a date. Anything you archive, delete or answer in Outlook closes itself.
- 3
Replies stay in the Outlook thread
Tessa suggests the reply and, when you send it, it goes out as a response to the original message so the conversation stays grouped in Outlook.
- 4
Meetings on Teams
If someone asks to meet in an email that arrived in Outlook, Tessa offers slots and creates the event with a Teams link.
What you get
- Keep your email clientStay in Outlook on desktop or mobile. Tessa works on top of it.
- Google and Microsoft togetherIf your team mixes Gmail and Outlook users, each connects their own and Tessa merges calendars and contacts.
- Drafts never send themselvesTessa can leave drafts in your Outlook but never sends them on her own.
- Private to each personYour Outlook mailbox is visible only to you in Tessera. Colleagues and managers have no access.
- Easy to disconnectDisconnecting deletes the link in Tessera, and you can withdraw consent in Microsoft’s My Apps portal.
Why it’s in beta
The Microsoft 365 integration is built on Microsoft’s official Graph API and covers mail, calendar and OneDrive. What’s missing is thorough testing against real customer tenants, so we label it beta. If you use it and something feels off, telling us helps a lot.
- Included: reading, sorting and replying to email; drafts; agenda and free slots; Teams events.
- Not yet: Teams chats as items in your inbox.
- Personal Microsoft accounts can’t create Teams for Business meetings, so the event is created without a link.
What Tessa reads for each person stays private, your data is stored in the EU and nothing goes out without your approval.
Frequently asked questions
How do I connect Outlook to Tessa?
In My connections, click Connect Microsoft and accept the permissions with your Microsoft 365 account. No Outlook add-in to install.
Can I use Outlook and Gmail at the same time?
Yes. Each person can connect either or both. Tessa replies from whichever account the email arrived in.
Will Tessa send email from my Outlook without permission?
No. Replies go out when you click Send. Anything to people outside the company waits for approval unless you change that rule.
Does it work with on-premises Exchange?
Tessa uses Microsoft Graph, the cloud API for Microsoft 365. Exchange servers hosted on your own premises aren’t supported.
What does beta mean here?
The integration follows Microsoft’s documentation but hasn’t yet been tested with enough real accounts. There may be details to iron out.
Keep reading
- CompareMicrosoft 365 Copilot vs Tessa: help inside each app, or one assistant for everythingCopilot lives inside Word, Outlook and Teams. Tessa works across your email, Slack and meetings and does the follow-ups for you. Compare and try free.
- FeaturesEvery email that asks for something becomes a taskTessa reads your email and Slack, turns every request into a prioritized task with a due date and clears what's already done. Try it free.
- FeaturesYour reply, already written and waiting for a yesTessa drafts the reply to every email or Slack message with the real context and in your tone. Review it, tweak it, send it in one click.
- IntegrationsBetaAI notes for Microsoft Teams meetings: minutes and tasks, doneTessa joins your Teams meetings, writes minutes with decisions and tasks per owner, and sends the recap. No extra Microsoft licences required.
- IntegrationsBetaOneDrive with AI: Word documents written with contextTessa searches and reads your OneDrive files, drafts proposals and minutes as Word documents using real company data, and transcribes Teams recordings.
- GuidesHow to manage email with AI without losing controlStop living in your inbox: a four-decision triage, email time blocks, filters worth setting up and how AI helps without taking control away from you.
What does your team look like?
Same AI for both. Where you start is what changes.
Startups
5 to 30 people
Grow without losing the thread
Tasks from email and Slack, follow-ups, sales and investors, without everything landing on the founders.
Companies
30 to 250 people
What gets decided gets done
Minutes and tasks from every meeting, commitments that get followed up and a pulse per team, without watching anyone.
Connect your Outlook and try Tessa on your own email.
Start freeFree plan for teams of up to 3 people. Anything that leaves the company waits for your approval.