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

Anonymous

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

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments

46 answers

Anonymous

2025-07-10T11:36:57+00:00

It's hilarious, a brief message appeared on my iPhone, informing me that someone had replied to my post above. When I clicked on it, it just brought me into my Outlook account which hasn't refreshed for 5 hours at this stage....
Was this answer helpful?

0 comments No comments
Anonymous

2025-07-10T11:36:24+00:00

When it could be fixed?
Was this answer helpful?

0 comments No comments
Anonymous

2025-07-10T11:27:37+00:00

Same here, it's extremely annoying and completely messing up my day!
Was this answer helpful?

0 comments No comments
Anonymous

2025-07-10T11:26:43+00:00

Same problem. I can't access my email on any device.
Was this answer helpful?

0 comments No comments
Anonymous

2025-07-10T10:59:41+00:00

it's not working
Was this answer helpful?

0 comments No comments