I can't add my school Microsoft mail to outlook. This is the troubleshoot message I have:

Kalina Savova Stoyanova 0 Reputation points
2025-11-28T21:14:29.3866667+00:00

{"SessionId":"c0a54d29-9d0b-ec4f-8430-7972d4ce0dc8","Timestamp":1764363378113,"Error":"CONNECTFAILED undefined"}

How can I fix it?

Outlook | Windows | Classic Outlook for Windows | For education
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  1. Q&A Assist
    2025-11-28T21:14:37.07+00:00
    AI generated content. This question contains an answer created with AI from Q&A Assist. Learn more

    To resolve the issue with adding your school Microsoft mail to Outlook, you can follow these troubleshooting steps:

    1. Check Email Address and Password: Ensure that you are entering the correct email address and password during the setup process.
    2. Run Windows Update: Make sure your Outlook client and Windows operating system are up to date. Outdated software can cause connectivity issues.
    3. Run a Microsoft 365 Diagnostic: Use the Microsoft 365 diagnostic tools to troubleshoot connectivity issues. This requires a Microsoft 365 administrator account.
    4. Check Autodiscover Settings: If you are using a custom domain, ensure that the Autodiscover CNAME record for your domain is set up correctly. Incorrect settings can prevent Outlook from connecting to the server.
    5. Check for Service Issues: If multiple users are experiencing similar issues, check the Microsoft 365 Service health status to see if there are any outages or service disruptions.

    If these steps do not resolve the issue, you may want to contact your school’s IT support for further assistance.

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  2. Kristen-L 7,360 Reputation points Microsoft External Staff Moderator
    2025-11-28T22:20:01.5433333+00:00

    Hi @Kalina Savova Stoyanova,

    Thank you for reaching out to the Microsoft Q&A forum.

    I understand you’re experiencing a CONNECTFAILED error when using Outlook for Education on Windows, which can be difficult when you need reliable access.

    Here are some steps to identify the cause and help you restore connectivity:

    1. Check internet connection
    • Make sure your network connection is stable. Test by opening a web browser and visiting any website.
    1. Update Outlook
    • Confirm that you’re running the latest version of Outlook. To check for updates: go to File → Update Options.
    1. Use Outlook web
    • Try to use Outlook web to if the issue still persists.
    1. Clear Outlook cache
    • Close the Outlook app.
    • Press the Windows + R keys simultaneously to open the Run dialog box.
    • Type the following path into the Run box and press Enter: %localappdata%\Microsoft\Outlook\RoamCache

    Open the folder containing the Outlook cache files.

    • This will open the RoamCache folder containing the cache files associated with your Outlook profile. Usually, it's located at: C:\Users{User name}\AppData\Local\Microsoft\Outlook\RoamCache
    • Click anywhere within the folder, press Ctrl + A to select all files, and then press the Delete key to remove them. Alternatively, you can right-click the selection and choose the Delete option from the context menu.

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    • After clearing the cache, restart Outlook again. It will rebuild the necessary cache files from scratch.
    1. Repair Outlook
    • Open Control Panel > Programs > Programs and Features.
    • Locate Microsoft Office, right-click it, and select Repair, then follow the on-screen instructions.

    I hope this information is helpful. Please follow these steps and let me know if it works for you. If not, we can work together to resolve this.    

    Thank you for your patience and your understanding. If you have any questions or need further assistance, please feel free to share them in the comments on this post so I can continue to support you. 

    I look forward to your thoughts on this. 


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