| EX1467029 | Exchange Online | Users may experience delays sending and receiving email messages from external domains in Exchange Online |
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| Status | serviceDegradation |
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| Classification | incident |
| User Impact | Users may experience a delay in sending and receiving email messages from external domains in Exchange Online. |
| Last Updated | 09/04/2026 12:45:00 |
| Start Time | 09/04/2026 10:19:12 |
| End Time | |
| Latest Message | Title: Users may experience delays sending and receiving email messages from external domains in Exchange Online
User impact: Users may experience a delay in sending and receiving email messages from external domains in Exchange Online. More info: Users may experience intermittent “Server busy” errors, affecting multiple mailboxes. Current status: We’re progressing with the disablement of the specific model, and telemetry is showing a decrease in matching and throttling actions as the rule changes propagate throughout the service. We estimate this rollout will complete within the next 30 minutes. Scope of impact: This issue impacts users who may be attempting to send and receive email messages from external domains in Exchange Online. This information may be updated as our investigation continues. Next update by: Friday, September 4, 2026, at 2:30 PM UTC |