Claude for classic Outlook

Windows ships two different Outlooks, and only one of them lets an AI assistant work inside your mailbox. Here is how to tell them apart, how to switch back to the right one in a single click, and how to connect Claude Desktop to it without admin rights or an IT ticket.

Which Outlook do I have?

Look at the top right of your Outlook window.

What you see	What you have
A toggle labelled New Outlook, switched on	The new Outlook — the rebuilt, lighter version
No toggle, and a ribbon with File · Home · Send / Receive · Folder · View	Classic Outlook — the one you want

Classic Outlook is the desktop application installed with Office and Microsoft 365. If Office is on your machine, classic Outlook is already there, even when the new Outlook is the one that opens by default.

Why Claude needs classic Outlook

The new Outlook is essentially the web version of Outlook wrapped in a desktop window. It does not expose the local automation interface that desktop applications use to talk to each other on Windows.

Classic Outlook does expose it. That single difference is what makes a purely local connection possible: Claude can read, sort, write and file inside your mailbox from your own machine, without your email being sent anywhere, without an Azure application to register and without a Microsoft Graph permission to request from your administrator.

Switch back to classic Outlook in one click

1. Open Outlook and look at the top right of the window.
2. Turn off the “New Outlook” toggle.
3. Outlook restarts on the classic interface. Nothing is installed, nothing is deleted, and no email is lost — both versions read the same mailbox and can coexist.

No toggle at all, and no classic Outlook on the machine? Download it free from Microsoft. It installs in your own Windows session and never asks for an admin password.

Connect Claude to classic Outlook

Once you are on classic Outlook, the connection itself takes about two minutes.

1. Install Outlink. The installer checks your machine, sets up whatever is missing and writes the Claude Desktop configuration for you — all inside your own session, with no admin rights.
2. Enter your licence key. It arrives by email on purchase and is validated online.
3. Authorise the tools. Restart Claude Desktop, send the first-run message from the guide, and answer “Always allow” when Claude asks for permission for outlink.

From then on you can ask in plain English: summarise my last 10 emails, reply to ACME that I confirm Thursday, set up a check-in tomorrow at 2 pm. The user guide lists everything Claude can do inside your mailbox.

Outlink and the official Claude add-in are not the same thing

Anthropic ships an official Claude add-in for Outlook. It targets a different setup, so the two rarely compete for the same user.

	Official add-in	Outlink
Outlook version	New Outlook and Outlook on the web	Classic Outlook for Windows
Deployment	Usually pushed by your Microsoft 365 administrator	Installed by you, in your own session
Admin rights	Admin consent generally required	None
Where your email goes	Through Microsoft cloud services	Stays on your machine

If your organisation has already rolled out the official add-in and you are happy on the new Outlook, use it. If you are on classic Outlook, or you cannot get anything approved by IT, Outlink is built for exactly that situation.

Common questions