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. JD2025 0 Reputation points
    2025-07-10T14:31:00.21+00:00

    This is really atrocious: i am getting the same error message and can’t access email on any of my devices or via web!

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  2. Johny Ward 0 Reputation points
    2025-07-10T14:30:16.0533333+00:00

    This was also my issue on multiple devices. Reloaded mobile app and now all personal email has been wiped from the device while corporate account is ok. Took a long time to then come across this thread.

    Has MS issued a estimated resolution time?

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  3. Amaro Faria Filho 0 Reputation points
    2025-07-10T14:29:43.8566667+00:00

    Same problem here.
    I'm getting error 401 when I try to access my email. Other stuff like OneDrive working as expected.

    Hope Microsoft fix this asap.

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  4. SYED RASHID 50 Reputation points
    2025-07-10T14:27:58.8866667+00:00

    Microsoft is working on the problem. See the pic for details and next update time: Screenshot 2025-07-10 102505

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    10 people found this answer helpful.