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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  1. Bob Fields 0 Reputation points
    2025-07-10T15:37:28.6266667+00:00

    Same issue for me. Chrome outlook (hotmail) refuses to even authenticate, returns the 401 error after 90 seconds. MS Edge authenticates successfully (phone text OTP confirmation) but then gives the same 401 auth error after 90 seconds. iPhone Outlook stopped receiving messages at 12:17 Eastern time, and sent messages sit in the Outlook outbox, unsent.

    So it doesn't look like an issue with the local COM add-ins or app, rather a global Outlook server issue. I hope they resolve it soon.

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  2. TH 0 Reputation points
    2025-07-10T15:33:54.6666667+00:00

    Is Microsoft working on this problem? Can any Microsoft support provide any answer? Thanks.

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  3. Tawney Eisenbraun 5 Reputation points
    2025-07-10T15:32:52.9933333+00:00

    Like everyone else, I too am having the same issue on my outlook account. I've tried different browsers, devices, clearing caches and history and cannot access my email.

    UTC Date: 2025-07-10T15:27:53.928Z
Client Id: 8FF0373BA413485C9BE4B19F04CF9EA1
Session Id: 4fd5eb29-396c-4df0-b72c-21293b7a5d0b
Client Version: 20250704003.04
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.5ec1239e.js:1:1039)
    at https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.mailindex.5ec1239e.js:1:163185
st: 401
efe: CYXPR03CA0067

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    1 person found this answer helpful.
  4. Pamela Aboytes Flores 5 Reputation points
    2025-07-10T15:27:15.9166667+00:00

    same here, I am desperate i cant access to any of my emails

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