Personal Outlook.com mailbox fails to load – HTTP 500 StartupData ServerError

Amir Nashat 0 Reputation points
2026-08-31T18:00:02.29+00:00

My personal Outlook.com account can successfully sign in to account.microsoft.com, but Outlook.com itself cannot load.

The error is: BootResult: fail Error: 500 esrc: StartupData et: ServerError

I reproduced the issue in Chrome, Chrome Incognito, and Ferdium. Other Outlook.com accounts work normally on the same computer and browser.

Microsoft Service Health shows all products operational.

This appears to affect only this specific personal Outlook.com mailbox. Is there any known issue or way to have the mailbox/backend checked?

Outlook | Web | Outlook.com | Email
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  1. Jonathan Deives 82,375 Reputation points Independent Advisor
    2026-08-31T18:33:18.6866667+00:00

    Other users are reporting the same issue, which could be a server-side error. There is currently an Exchange error, and multiple users are also reporting Outlook outages.
    https://status.cloud.microsoft/

    https://x.com/MSFT365Status/status/2094455556454920701
    The link above is not an official Microsoft site; however, it is related to the post on the official X page reporting the outage.

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