Microsoft Exchange Online Hit with Fresh Outage
A new Exchange Online outage is affecting users of Microsoft's business email platform, causing delays in sending and receiving emails from external domains.
The incident, tracked as EX1467029, began on September 4, 2026, around 3:49 PM GMT+5:30 and has continued through multiple status revisions issued by Microsoft that afternoon.
Affected users have reported intermittent 'Server busy' errors when attempting to communicate with recipients outside their own organization, a symptom typically associated with backend processing delays rather than complete mail-flow failures.
Microsoft's engineering teams have identified that anti-spam protections may be compounding the problem for a subset of affected accounts, effectively slowing down legitimate mail even further as filtering systems interact with the underlying fault.