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

Locked Question. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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

Was this answer helpful?

30+ people found this answer helpful.

60 additional answers

Sort by: Most helpful
  1. Jennifer Dagostino Young 0 Reputation points
    2025-07-10T14:41:49.06+00:00

    Cannot access outlook for hours

    Was this answer helpful?

  2. Gerardo Collazo 0 Reputation points
    2025-07-10T14:35:19.14+00:00

    Same error in Uruguay - Sth American region

    UTC Date: 2025-07-10T13:32:49.139Z
    Client Id: 110F9C473B3941B3A0ECC65F9EC738A9
    Session Id: 02f243c8-fea7-4a9d-817d-91b6f83347e8
    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: SCYPR80CA0008
    

    Was this answer helpful?

  3. 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!

    Was this answer helpful?

    0 comments No comments
  4. 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?

    Was this answer helpful?

    0 comments No comments