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Re:Outlook is down, and so is Microsoft's status page by mminer237 on Thursday November 12, 2026 @06:02PM (#50475672)
Newest update says that wasn't the issue after all. They say relatively small loads are actually causing servers to become unresponsive and have to be restarted.

They still don't know why this "core process" is maxing out the processor for no reason.

Re:Outlook is down, and so is Microsoft's status page by SoftTalker on Thursday November 12, 2026 @09:16PM (#50477237)
I'd start with "what has changed" but surely they've looked at that.
Re:Outlook is down, and so is Microsoft's status page by jamesfinlayson on Friday November 13, 2026 @12:26AM (#50478733)
Could be something adjacent - the last time I majorly blew up a release was because something had changed (which was fine) but it caused a list of items to be broken over two pages, but only in prod. Me and a team mate were scratching our heads for the longest time because "what had changed" was quite mundane itself.
Re:Outlook is down, and so is Microsoft's status page by sire-vc on Friday November 13, 2026 @06:46AM (#50482153)
The classic 'database is smaller in testing than in prod' problem which is responsible for some outages IME. Often the 'query was not optimised but that didn't show until prod' one.
Re:Outlook is down, and so is Microsoft's status page by NetMageSCW on Friday November 13, 2026 @03:00PM (#50488862)
They did look at recent changes but none seemed to be related, but it turned out recent network changes triggered a failure mode in a much older network change. Dependent or cascading issues remain hard to diagnose or find.
Re:Outlook is down, and so is Microsoft's status page by waz0wski on Thursday November 12, 2026 @10:49PM (#50478012)
There was an article posted here on HN by a former MS / Azure person that described the dumpster fire - what's going on today doesn't surprise me at all

https://isolveproblems.substack.com/p/how-microsoft-vaporize...

https://news.ycombinator.com/item?id=47616242

Re:Outlook is down, and so is Microsoft's status page by Anon1096 on Friday November 13, 2026 @12:08AM (#50478614)
Azure is still humming along working fine.