Security News > 2023 > July > Microsoft investigates Outlook.com bug breaking email search
Microsoft is investigating an ongoing issue preventing Outlook.com users from searching their emails and triggering 401 exception errors.
"Our initial review of Outlook.com server logs, in parallel with HTTP Archive format logs captured during an internal reproduction of impact, indicates 401 errors are occurring due to an exception when users attempt to perform the search," Microsoft says on the service health portal.
The outage started almost 11 hours ago, at 12:30 AM UTC, and Microsoft is expected to provide more details within the next couple of hours.
Others have reported having issues when contacting Microsoft 365 personal support, being caught in a loop of sign-in and Office 365 service choice prompts.
Earlier in June, Microsoft also confirmed that some of its services, including Outlook.com, the Azure Portal, and OneDrive, were taken down by DDoS attacks claimed by a threat actor known as Anonymous Sudan.
Microsoft 365 users report Outlook, Teams won't start or freezes.
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