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
    2023-04-27T09:08:21+00:00

    Good morning (UK)

    I'm back up working all OK today.

    Last night, I did an Online Repair (from Control Panel) of the entire M365 suite but didn't have time to test the result.

    So, either that fixed it or something else has happened overnight. Anyway, I hope it's a way forward for those of you who have the ability / permissions to try this.

    Good luck.

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  2. Anonymous
    2023-04-27T06:08:40+00:00

    just following Tip 1 from 11 Tips to Fix Outlook Login Error [2023] (wondershare.com) did the trick!..

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  3. Anonymous
    2023-04-26T19:50:53+00:00

    Client has reported the problem today. They have two M365 mailboxes - their main one is working fine but a secondary mailbox (using an Exchange-only license) is throwing this error. Will check their 2FA status. Access via web browser is fine.

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  4. Anonymous
    2023-04-26T16:43:02+00:00

    Hi, I'm experiencing exactly the same. I use Office 365 and access all email accounts via Outlook. Others are working fine but Outlook.com address is throwing up the same error. I can access it via the web with no issues and on my iPhone with no problem. It's just not working on my PC. Infuriating! I have reset my password and it seems to have triggered from that today 26/04/23. Any solution will be gratefully received. I removed my outlook.com account and have tried to add it and no success.

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  5. Anonymous
    2023-04-26T14:27:00+00:00

    Same error has been occurring here on my Surface Pro for the past couple days now, and ironically, it's happening with just my personal Outlook account in Outlook 365 Desktop out of the total of 12 personal/work/community email accounts I have setup in it.

    Clearly microsoft has broken something on their end...

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