Unable to access my Outlook/hotmail email account. Error 401- RESOLVED

TeresaM 370 Reputation points
2025-07-10T05:49:26.7866667+00:00

Something is wrong with my personal email account, as other members of my family are able to access their Outlook email accounts. When I try to log on to Outlook (hotmail) on my phone or on my PC, I receive the following error message. I need to be able to access my emails. Please advise on how I can resolve this. I have already reset my password and cleared my cache and history.

UTC Date: 2025-07-10T05:33:04.707Z
Client Id: 8798D6BD74FF43679B325E07B4F542E7
Session Id: 85f3e46d-11d3-463d-bf21-b26d2fb91ceb
Client Version: 20250620014.20
BootResult: fail
Back Filled Errors: Unhandled Rejection: Error: 401:undefined|undefined:undefined
err: Error: 401
esrc: StartupData
et: ServerError
estack: Error: 401
    at Object.w [as createStatusErrorMessage] (https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.mailindex.ad3a7e4e.js:1:1039)
    at https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.mailindex.ad3a7e4e.js:1:161561
st: 401
efe: PH8PR20CA0019
Outlook | Windows | Classic Outlook for Windows | For business

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Answer accepted by question author
MER 270 Reputation points
2025-07-10T10:31:01.1633333+00:00

I have spoken with Microsoft this AM via live chat and its a known issue which is effecting some users. They are working on the issue and hope to have it resolved asap

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60 additional answers

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  1. sebastien turcot 0 Reputation points
    2025-07-10T13:34:19.4666667+00:00
    UTC Date: 2025-07-10T13:07:22.582Z
    Client Id: 4A4731D674384793893F424B9C0C77E7
    Session Id: 662d0d23-7b2d-4d75-9ed8-343ca8ab9102
    Client Version: 20250620014.20
    BootResult: fail
    Back Filled Errors: Unhandled Rejection: Error: 401:undefined|undefined:undefined
    err: Error: 401
    esrc: StartupData
    et: ServerError
    estack: Error: 401
        at Object.w [as createStatusErrorMessage] (https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.mailindex.ad3a7e4e.js:1:1039)
        at https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.mailindex.ad3a7e4e.js:1:161561
    st: 401
    efe: YQZPR01CA0061
    

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  2. Rajvinder Dhillon 0 Reputation points
    2025-07-10T13:47:41.18+00:00

    I have the same issue and error message. Has anyone heard back from Microsoft? I haven’t been able to get through on the online support chat and there are no other contact details. Anyone have any ideas when this will be resolved please. I am able to access my Microsoft account but not outlook for emails.

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  3. Heather 0 Reputation points
    2025-07-10T14:02:47.08+00:00

    I am having the same issue on all devices. Hoping it it gets fixed soon.

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  4. Felicia Lau SC 0 Reputation points
    2025-07-10T14:19:41.3133333+00:00

    i am having the same issue on my personal mailbox since yesterday on my laptop and mobile not able to receive and send emails. Please fix this problem asap as i have important emails to look out for.

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