Can't sign in outlook Server Error: 401:undefined|undefined:undefined

Anonymous
2025-07-10T00:38:26+00:00

Can't sign in outlook Server Error: 401:undefined|undefined:undefined

UTC Date: 2025-07-10T00:19:57.157Z
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: KL1PR01CA0055
Outlook | Web | Outlook.com | Email

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  1. Anonymous
    2025-07-10T11:26:43+00:00

    Same problem. I can't access my email on any device.

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  2. Anonymous
    2025-07-10T10:59:41+00:00

    it's not working

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  3. Anonymous
    2025-07-10T10:42:49+00:00

    same problem I am facing last 4 hrs

        UTC Date: 2025-07-10T10:38:43.858Z

    Client Id: E1BF82DD8C9F43E3B78C0F4652B2D2CC Session Id: d72b41bf-3106-48a6-9167-6375741ac7c9 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: DX0P273CA0058

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  4. Anonymous
    2025-07-10T10:41:19+00:00

    Tengo el mismo inconveniente 

    UTC Date: 2025-07-10T10:38:12.439Z
Client Id: F0DC03618E5F42E8ABB8FA7F5A7DF7F4
Session Id: f04ab2cc-7e5f-4a2e-8d6c-3396db6d15fd
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: BL1PR13CA0359

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  5. Anonymous
    2025-07-10T10:29:48+00:00

    I have the same issue, after chatting with support they informed me that it is a know issue and Microsoft is working on an update that should be live in about 1 hour. This is the page to view the report: https://status.cloud.microsoft/m365/referrer=serviceStatusRedirect 

    I really hope this will be solved soon.

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    5 people found this answer helpful.
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