Outlook Microsoft Mail: Which Outlook You Need and How to Use It

“Outlook” is Microsoft’s email service and the family of apps you use to read it: free webmail at Outlook.com, the new Outlook app that replaced Windows Mail on Windows 10 and 11, the long-running classic Outlook desktop app, plus mobile and Mac versions. If you searched for “Outlook Microsoft mail”, you most likely want to sign in to Outlook.com, set up the Outlook app on Windows, or figure out why your old Mail app was replaced.

This guide sorts out which Outlook is which, how to get and use a Microsoft mail account, and what is changing for Windows and business users, as of October 2026.

Which “Outlook” are you dealing with?

Microsoft uses the Outlook name for several products. Knowing which one you are in saves a lot of confusion when following instructions online.

The new Outlook for Windows is labelled with a “New” tag on its app icon, which is the quickest way to tell it apart from classic Outlook, as Office Watch notes.

Getting a free Microsoft mail address

A free Outlook.com account gives you an address like name@outlook.com. Per Microsoft’s Outlook plan page, the free tier includes 15 GB of mailbox storage, 5 GB of OneDrive cloud storage, and access to the web and mobile versions of Word, Excel and PowerPoint. Paying for Microsoft 365 adds ad-free mail, advanced security features and more mailbox and OneDrive storage. Prices and storage figures change from time to time, so check Microsoft’s page before you buy.

To create an account, follow Microsoft’s official sign-up guidance:

1. Go to outlook.com in your browser.
2. Select Create free account.
3. Choose a unique username for your new address.
4. Set a password and complete the verification steps Microsoft shows you.

The same address and password become your Microsoft account, which you can use to sign in to Windows, OneDrive, Edge and other Microsoft services. Addresses ending in @hotmail.com and @live.com are also Microsoft accounts and sign in at the same place.

Signing in

1. Go to outlook.com and select Sign in.
2. Enter your email address (or the phone number linked to your account) and select Next.
3. Enter your password or approve the sign-in on your phone if you use passwordless sign-in.

Only sign in through outlook.com, the official Outlook apps, or a link from Microsoft. If you can’t get in, use Microsoft’s own account recovery flow rather than any third-party “recovery” service.

What happened to Windows Mail and Calendar?

If your PC used to have a simple app called Mail and now opens Outlook instead, that is intentional. According to Microsoft Support, support for Windows Mail, Calendar and People ended on December 31, 2024. Microsoft recommends moving to the new Outlook for Windows or using Outlook.com in a browser, and new Windows 11 devices now ship with the new Outlook as the default mail app.

Microsoft says the old apps may still open, but you should not expect them to send and receive mail or create appointments. Reports from early 2025 differed on exactly when individual PCs stopped syncing, so treat the old apps as unreliable either way.

The good news: Microsoft says local emails, calendar events and contacts stored in Mail, Calendar and People remain exportable so you can import them into the new Outlook. If you have mail that only ever lived on that PC (for example, from a POP account), export it before you remove the old app.

New Outlook vs classic Outlook

The new Outlook for Windows is built on the same foundation as Outlook on the web. It handles Outlook.com, Microsoft 365 work accounts and other providers such as Gmail in one place. Classic Outlook is the older desktop app that many businesses depend on for add-ins, shared mailboxes, PST files and automation.

Coverage from outlets like TechRadar and Office Watch makes the same point: the new Outlook still lacks some classic features, and it drops some of the development technologies that classic Outlook supported. If your team relies on custom add-ins or macros, test them in the new app before anyone is moved.

How to switch back to classic Outlook

If you have both apps and prefer classic Outlook, the usual official path, described by Office Watch and many university IT help desks, is:

1. In the new Outlook, find the New Outlook toggle in the top-right corner and turn it off.
2. In the dialog that appears, choose to go back to classic Outlook.
3. Next time, open Outlook from the Start menu and pick the version without the “New” tag.
4. To stop being moved again, open classic Outlook, go to File > Options > General > New Outlook options, and clear Automatically switch me to new Outlook.

Some builds show Help > Go to classic Outlook instead of, or as well as, the toggle. If neither option appears, classic Outlook may not be installed on your PC (it comes with Microsoft 365 / Office), or your organisation may control the setting. In a work environment, ask your IT team rather than changing system settings yourself.

The “classic Outlook style” setting

For people who simply miss the old look, Microsoft added an optional classic style to the new Outlook and Outlook on the web. According to Office 365 for IT Pros and Microsoft’s Message Center post MC1458476, it began rolling out in August 2026, with general availability expected to finish around late October 2026, so you may or may not see it yet.

To try it:

1. Open the new Outlook (or Outlook on the web).
2. Go to Settings > General > Appearance.
3. Turn on Enable classic Outlook style.

It is a visual change only. It makes the layout look closer to classic Outlook but does not add back missing features, and Microsoft shows a note that some appearance settings are not available in this style.

What is changing for businesses (and when)

Microsoft’s rollout plan for the new Outlook in organisations has moved several times, so it is worth being precise about what has been reported:

• Opt-out phase moved to March 2027. Microsoft originally planned to start making the new Outlook the default for enterprise users in April 2026. TechRadar and heise online report that this was pushed to March 2027. In that phase, users get the new Outlook by default but can still switch back, and admins control whether that’s allowed.
• Classic Outlook isn’t going away soon. Analysts at Directions on Microsoft report that classic Outlook remains available in Microsoft 365 Apps for enterprise until at least 2029. TechRadar notes Microsoft has not announced a firm end-of-support date.
• Some details conflict. A few older or third-party articles still cite April 2026 or April 2027 for the opt-out phase. The newer reporting and Microsoft’s Message Center point to March 2027, but check the Microsoft 365 admin center for the dates that apply to your tenant.

Picking the right setup for the long term

A few practical rules based on the above:

• Personal user on Windows: use the new Outlook or outlook.com. The old Mail app is no longer supported, and the new Outlook is where Microsoft’s development is going.
• Small team on Microsoft 365: the new Outlook is fine for most day-to-day mail and calendar work. Check for any add-ins you rely on before you standardise.
• Organisation with heavy Outlook automation: keep classic Outlook available, inventory your add-ins and macros now, and plan testing ahead of the March 2027 opt-out phase.

Microsoft updates Outlook constantly, and menu names and dates may change after October 2026. When in doubt, Microsoft Support and your admin center are the final word.