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Outlook Confusion

Demetrius Karantinopoulos 85 Reputation points
2026-03-13T17:33:06.71+00:00

Dear All,

I am really very confused about Outlook and it's different types of versions.
I have a home user subscription for Microsoft 365.
The package includes Outlook.
But which Outlook?
I want to use the Outlook 365.

My PC has already Outlook (Classic).
I don't want to use Classic Outlook but 365 Outlook.

Also I cannot find the proofing settings in Outlook 365.
When I wrote an email in English (USA), it underlines me every word with red color!

How to fix that?

I also want to have proofing for both English (USA) and Greek.
How to do that?

Thank you very much!!

Outlook | Windows | Classic Outlook for Windows | For home
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  1. Sumit D - IA 165.2K Reputation points Independent Advisor
    2026-03-13T18:22:08.81+00:00

    Hi,

    Answers as requested:

    1. Microsoft 365 includes Outlook 365 as a product.
    2. Outlook 365 and Outlook Classic are the same products. Names are used interchangebly.
    3. Outlook New is the new Outlook replacing the Mail and Calendar apps on Windows 10, and also the one Microsoft pushes in Classic Outlook very often.

    User's image

    1. The classic Outlook and 365 Outlook should show this in File > Accounts:

    User's image

    5:

    Click Outlook options > Mail > Editor Options to open Proofing menu:

    User's image

    1. To add a Proofing language:

    Select FileOptions.

    • Go to Language.

    • Under Office authoring languages and proofing, select Add a language.

    • Choose the language you want and select Add.

    I hope this information helps. If you have any more questions, don't hesitate to reach out.

    Otherwise, please take a moment to rate the answer. Wishing you good luck!

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  2. Q&A Assist
    2026-03-13T17:33:26.1233333+00:00
    AI generated content. This question contains an answer created with AI from Q&A Assist. Learn more

    There are several Outlook products and the naming can be confusing. The key points for a home Microsoft 365 subscription and proofing are:

    1. Which Outlook is included with Microsoft 365 for home
      • A Microsoft 365 home subscription includes classic Outlook for Windows as a desktop app.
      • On Windows there are now two Outlook for Windows apps:
        • New Outlook for Windows (with a Settings button in the top-right).
        • Classic Outlook for Windows (no Settings button in the top-right; uses the File tab).
      • For home users, “Outlook 365” usually means classic Outlook for Windows that comes with Microsoft 365 or Outlook on the web when signed in with a Microsoft 365 account.
      To see which Outlook you are using on Windows:
      • If the window has a Settings button in the top-right, it is new Outlook for Windows.
      • If there is no Settings button and there is a File tab, it is classic Outlook for Windows.
      To check the exact version of classic Outlook:
      1. In Outlook, select File.
      2. Select Office Account (or Help if Office Account is not shown).
      3. Under Product Information, see the Outlook version and build.
      4. Select About Outlook to see whether it is 32-bit or 64-bit and more details.
    2. Outlook on the web vs desktop Outlook
      • Outlook.com / Hotmail.com is the free, web-based Outlook for personal Microsoft accounts (URL starts with outlook.live.com).
      • Outlook on the web is the browser version used with work or school accounts (URL contains outlook.office.com or outlook.office365.com).
      • These web versions are different from the desktop Outlook app installed from Microsoft 365.
    3. Why English text is underlined in red
      The context provided does not include the detailed steps for configuring proofing languages in Outlook, only how to identify Outlook versions. It can only be stated that the red underlines indicate the spell checker is not using the correct proofing language for the text. The exact steps to change proofing settings in Outlook are not present in the supplied material.
    4. Using English (USA) and Greek proofing
      The provided context does not document how to enable or switch between multiple proofing languages (such as English (USA) and Greek) in Outlook. It only covers how to determine which Outlook product and version is in use.

    References:

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