401 Error when trying to login to Outlook.com or outlook.live.com

DC 0 Reputation points
2026-06-28T23:05:50.5433333+00:00

When I try to log into outlook.com or outlook.live.com I receive a 401 error code (see below). I've already performed the following steps:

  • Tried on multilple devices (iphone, mac, pc)
  • Cleared cache, cookies, etc
  • Tried on multiple browsers (Safari, Chrome, Brave)
    • Also tried in Private Mode on all
  • Verified I was not on VPN
  • Waited a total of 8 hours
  • Submitted a recover account request but i was told I didn't provide enough info. I provided everything requested and even added extra fields

Because I can't log into outlook.live.com I cannot contact anyone who can provide support. I believe this is a server side issue but without being able to contact support, I'm unable to verify. Any ideas on next steps?

ERROR MESSAGE

UTC Date: 2026-06-28T21:47:37.928Z
Client Id: E2090B0A23144815A424FC9D845F9035
Session Id: 949b9a5c-dd53-4e84-917c-c1646f40686d
Client Version: 20260619010.12
BootResult: fail
Back Filled Errors: Unhandled Rejection: SyntaxError: Failed to execute 'json' on 'Response': Unexpected end of JSON input:undefined|undefined:undefined|undefined:undefined|undefined:undefined|Unhandled Rejection: SyntaxError: Failed to execute 'json' on 'Response': Unexpected end of JSON input:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|Unhandled Rejection: SyntaxError: Failed to execute 'json' on 'Response': Unexpected end of JSON input:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined|undefined:undefined
err: COMException
esrc: StartupData
et: ServerError
estack: Error: 401
    at Object.w [as createStatusErrorMessage] (https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.mailindex.c6be745f.js:1:806)
    at https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.mailindex.c6be745f.js:1:188024
st: 401
ehk: X-OWA-Error
efe: SJ0PR03CA0199
reqid: 668802ad-4e08-3dbd-fb51-cbda01b7d836
cv: Ct0pUyQ2y22cwHxvLjMYX2.3.1.1
Outlook | Web | Outlook.com | Email
0 comments

2 answers

Sort by: Oldest
Most helpful Newest Oldest
  1. EmilyS726 273.7K Reputation points Independent Advisor
    2026-06-28T23:42:59.35+00:00

    Hello

    Is this a personal account, or an organization account?

    Have you tried a different network? I saw you tried different devices, just want to make sure they are not all on the same Wifi.

    If this is personal account, see if you can sign into https://account.live.com

    If this is organization, see if you can sign into https://myaccount.microsoft.com

    Was this answer helpful?

    0 comments
  2. DC 0 Reputation points
    2026-06-29T14:46:09.4833333+00:00

    Hello and thank you for the reply. My issue seems to have resolved itself overnight, but I appreciate you taking the time to try to help.

    Was this answer helpful?

Your answer

Answers can be marked as 'Accepted' by the question author and 'Recommended' by moderators, which helps users know the answer solved the author's problem.