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Exchange Online outage causes email delays, 'Server busy' errors
BleepingComputer • • technology
Key Points:
- Microsoft experienced an Exchange Online outage (EX1467029) causing delays and intermittent "Server busy" errors for emails sent to and received from external domains, first acknowledged at 2:19 AM EDT.
- The issue affected multiple mailboxes and was potentially worsened by anti-spam protections, which contributed to additional delays for some users.
- Microsoft has not specified the regions or number of users impacted but classified the event as an incident with noticeable user impact and is still investigating the root cause to determine mitigation steps.
- Similar Exchange Online outages occurred earlier this year, including service disruptions in April and June, as well as a major Microsoft 365 outage earlier in the week causing authentication and connection problems.
- As of September 4, 10:26 EDT, Microsoft confirmed the EX1467029 issue is resolved for new emails, with ongoing monitoring and final validations to ensure full resolution.
