Getting 2400 error in outlook application

Anonymous
2023-04-11T09:25:43+00:00

Hi,

Something went wrong [2400] error in outlook application. Web outlook is working fine.

Tried outlook repair, reinstallation, new profile creation and cleared password from device credential manager still issue persist. Seems like Microsoft issue. Screenshot attached

Please share any troubleshooting steps for permanent fix

Thanks

Anand

Outlook | Windows | Classic Outlook for Windows | For home

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  1. Anonymous
    2023-09-02T05:07:27+00:00

    I think Microsoft has updated something at their end for account verification, and Outlook now can't cope with personal Microsoft accounts.

    My set up: Windows 10, Office 365 accounts, Hotmail account that stopped working

    What worked for me was

    1. Close Outlook
    2. Go to Windows --> Settings --> Accounts --> Email and Accounts --> Select the Hotmail or other personal account

    --> Click Manage

    --> Change option to "Microsoft apps can sign me in"

    1. Restart Outlook.

    Hope that helps!

    Sifet

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  2. Anonymous
    2023-09-04T05:44:16+00:00

    Hi Chai,

    Your suggestion works wander. It solves my problem too

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  3. Anonymous
    2023-09-04T13:31:38+00:00

    Sifet, thank you this fixed the problem in 30 seconds,

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  4. Anonymous
    2023-09-11T13:41:04+00:00

    Hi,

    Something went wrong [2400] error in outlook application. Web outlook is working fine.

    Tried outlook repair, reinstallation, new profile creation and cleared password from device credential manager still issue persist. Seems like Microsoft issue. Screenshot attached.

    Can you please help?

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  5. Anonymous
    2023-10-18T08:40:03+00:00

    It doesn't work for my Microsoft Account with Primary Email (...@testing.xyz domain).

    Also try'd with ...@outlook.de alias but it doesn't work with new outlook app

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