error when trying to log in to microsoft outlook web app

Question

Received the following error message when trying to log in to outlook web browser, teams and other web applications work just fine.

I have reset Cache and cookies and tried on different devices.

UTC Date: 2026-08-31T23:43:17.951Z
Client Id: A83FAEDB9CAF4FBDA05FB92C038FBF35
Session Id: 5de94a6e-ee52-4681-b4a5-686234fb5048
Client Version: 20260821009.09
BootResult: fail
Back Filled Errors: None
err: Error: 500
esrc: StartupData
et: ServerError
estack: Error: 500
    at Object.w [as createStatusErrorMessage] (https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.mailindex.491fdc82.js:1:806)
    at https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.mailindex.491fdc82.js:1:192520
st: 500
efe: SA9PR13CA0147
reqid: de26c590-67eb-c98b-238d-fb22473c374f
cv: wjrmd1lqaHaKGjfz6ltpXn.3.1.1

Answer 1

There is something wrong with the mailserver. (For outlook.com accounts also.)

https://status.cloud.microsoft/

Exchange Online:

-Users may be unable to connect to, or experience degraded functionality, with Exchange Online. All connection methods are affected.