1. Outlook on the Web
You can access Outlook through either of these links:
Key Features
No installation required.
Works in web browsers.
Always up to date.
Recommended for troubleshooting sign-in and email access issues.
Best For
Temporary email access.
Signing in from another computer.
Accessing email when the desktop app isn't working.
2. Outlook Classic for Windows
Outlook Classic is the traditional desktop version of Outlook.
Download or reinstall Outlook Classic: Microsoft Support.
Key Features
Supports Microsoft 365 email accounts.
Recommended in this guide for desktop use.
Compatible with the Business Basic, Standard, and Ultimate licenses described in this article.
Important Information
The source information states that Outlook Classic is available to download for Windows and recommends it over New Outlook for these Microsoft 365 accounts.
Your available features may depend on your license and Microsoft’s current software requirements.
3. New Outlook for Windows
New Outlook is a modern version of Outlook that comes preinstalled on many new Windows computers.
Important Account Limitation
Some Microsoft 365 accounts, such as Business Basic accounts, may encounter restrictions when adding an account as the first or primary account in New Outlook.
If you experience this issue, the original guidance recommends:
Adding a personal account, such as Outlook.com or Gmail, first.
Adding your Microsoft 365 account afterward.
Alternatively, use Outlook Classic or Outlook on the web.
How Microsoft 365 Licenses Affect Outlook
According to the source information, a Basic license provides:
Access to web applications.
Access to email through a web browser.
Access to Outlook Classic.
However, a Basic license does not necessarily guarantee full functionality in New Outlook for Windows, which is managed separately by Microsoft.
Which Outlook Version Should You Use?
Situation | Recommended option |
Using email on a Windows computer | Outlook Classic |
Using email on a mobile device | Microsoft Outlook mobile app |
Troubleshooting sign-in or email issues | Outlook on the web |
Using a computer where you can't install software | Outlook on the web |
Having trouble adding a Microsoft 365 account to New Outlook | Try Outlook Classic or Outlook on the web |
Summary
For everyday email access on a computer, this guide recommends Outlook Classic.
Use Outlook on the web when troubleshooting or when you need quick access without installing software. If New Outlook won't accept your Microsoft 365 account, try one of these alternatives.