GoKawiilMicrosoft is investigating a widespread service issue causing authentication issues, connection problems, service delays and failures, and various other issues for Microsoft 365 customers.
It first acknowledged this incident (tracked under EX1464935 in the admin center) at 5:30 PM UTC, when it began investigating a stream of reports from users on social media regarding multiple issues affecting Exchange Online.
However, while Exchange Online is the most impacted service, Microsoft revealed in a new incident report (MO1465074) that this outage also impacts multiple other Microsoft 365 services, including OneDrive for Business and SharePoint Online, Microsoft Teams, Microsoft Purview, and Microsoft Defender XDR.
According to outage tracking service Downdetector, tens of thousands of Outlook and Microsoft 365 users are affected and experiencing issues receiving emails via Outlook and accessing Microsoft cloud services.
Microsoft says the list of Exchange Online symptoms includes:
Delays or failures when sending or receiving email messages.
Delays, failures, or incomplete results when searching for content within Exchange Online mailboxes.
Authentication-related errors when accessing Exchange Online services.
Difficulties accessing or performing actions within Exchange administration experiences.
Intermittent failures affecting mailbox operations and message delivery workflows.
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