When using Microsoft 365, there are currently three different versions of Outlook. It is important to understand the differences, as functionality and compatibility vary between them.
Outlook on the Web
Access via:
Features
No installation required
Works in all web browsers
Always up to date
Recommended for troubleshooting
Best suited for
Temporary use
Logging in from another computer
When the desktop app is not working
Outlook Classic (Recommended for Computers)
Outlook Classic is the traditional version of Outlook that has been used for over 20 years.
Download here:
👉 https://support.microsoft.com/en-us/office/install-or-reinstall-classic-outlook-on-a-windows-pc-5c94902b-31a5-4274-abb0-b07f4661edf5
Important information
Outlook Classic is now free to download for Windows
It works reliably with Microsoft 365 accounts
It is recommended instead of "New Outlook"
This version is most compatible with Business Basic, Standard, and Ultimate licenses
New Outlook (Windows)
New Outlook is a more modern version that is preinstalled on many new Windows computers.
⚠ Limitation
Microsoft 365 accounts (for example Business Basic) cannot be used as the primary account directly in New Outlook.
For example:
If you have a Basic license and buy a new computer
You cannot add your Microsoft 365 account as the first account in New Outlook
You must first add a personal account, such as:
Outlook.com
Gmail
After that, you can add your Microsoft 365 account.
This is a limitation from Microsoft.
Important Information About Licenses
Purchasing a Basic license provides:
Access to web apps
Access to email via the web
Access to Outlook Classic
However, it does not automatically provide full functionality in New Outlook for Windows, as that version is managed separately by Microsoft.
Support Recommendation
For the best stability, we recommend:
Device | Recommended Application |
Computer | Outlook Classic |
Mobile | Outlook App |
Troubleshooting | Outlook on the Web |