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. 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.
  2. Senthil Rajan 15 Reputation points
    2025-07-10T10:45:44.48+00:00

    Hi there, Am also having the same issue since this morning. Is this affecting many users?

    UTC Date: 2025-07-10T10:38:53.426Z

    Client Id: C7AC4F23FE714ED2AE6132834069447C

    Session Id: 7658497d-a4fc-462a-9e00-03d4b0330732

    Client Version: 20250620014.20

    BootResult: fail

    Back Filled Errors: Unhandled Rejection: SyntaxError: Failed to execute 'json' on 'Response': Unexpected end of JSON input:undefined|Unhandled Rejection: Error: 401:undefined|undefined: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: SY5PR01CA0073

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    3 people found this answer helpful.
  3. Matt 10 Reputation points
    2025-07-10T15:48:39.49+00:00

    Quote frankly, this is just terrible support. I pay for 365 and have no access to email for nearly 24 hours. The only saving grace is that I can see the push notifications on my phone telling me who the email is from, although when I click on it the outlook app says it can't be opened.

    You would think Microsoft would have the foresight to put a message up on the 500 or 401 error page so people don't spend an hour plus trying to contact what seems to be a non-existent customer support team.

    Fix the authentication issues. 24 hours is eternity in the world of computing.

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    2 people found this answer helpful.
  4. Laurk 10 Reputation points
    2025-07-10T15:18:41.96+00:00

    I just received a pop up on my PC that an email was sent to me on how to resolve outlook access, but I have not received the email in my Outlook, because it is not working! Why would Microsoft send an email? How can I fix this?

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    2 people found this answer helpful.