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

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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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
    2023-09-02T04:59:33+00:00

    klaw48 solution worked for me. Thanks all!

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  3. Anonymous
    2023-09-01T16:37:14+00:00

    Hi Darpan,

    Thanks for your reply. I am currently experiencing the same issue but do not know how to send a private message with a reply with the requested information.

    Do you have other suggestions?

    Jacinda

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  4. Anonymous
    2023-09-01T04:47:30+00:00

    Thank you! I have been fighting with this for hours. The link you provided led to a solution that involved deleting a registry entry.

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  5. Anonymous
    2023-08-31T18:45:14+00:00

    I had the same issue, but I managed to fix it.

    On Outlook application, go to File > Office Account, check whether your affected email address is signed in under Account (on the left side).

    If it is not, then try click Switch account and check whether your affected email address account is there.

    Most likely it is not, just add and sign in and it should be fixed.

    You can switch back to your original account after you added the affected email address account.

    Worked for me also! Had to close out of Outlook and open again afterwards. Thanks!

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