Trimble Transportation incident
Microsoft 365 Users Experiencing Email Delivery Delays
Resolved after 3 days 6 hours, on September 4, 2026.
Microsoft has mitigated the Exchange Online issue that caused delays or failures when receiving emails sent by Trimble. Email delivery has returned to normal, and no further impact is expected. This incident originated within the Microsoft 365 ecosystem and was not caused by Trimble systems or infrastructure.
Update timeline
- monitoring Sep 04, 2026, 11:27 AM UTC
A subset of Microsoft 365 Exchange Online users may experience delays or failures receiving e-mails sent by Trimble. This is an issue within the Microsoft 365 ecosystem and is not caused by Trimble systems or infrastructure. Microsoft is currently analyzing the behavior and review service telemetry to identify the underlying cause and determine the most effective mitigation. As we receive additional information from Microsoft, we will provide updates. For the latest information, please visit the Service Health page within your Microsoft 365 portal.
- investigating Sep 04, 2026, 11:27 AM UTC
A subset of Microsoft 365 Exchange Online users may experience delays or failures receiving e-mails sent by Trimble. This is an issue within the Microsoft 365 ecosystem and is not caused by Trimble systems or infrastructure. Microsoft is currently analyzing the behavior and review service telemetry to identify the underlying cause and determine the most effective mitigation. As we receive additional information from Microsoft, we will provide updates. For the latest information, please visit the Service Health page within your Microsoft 365 portal.
- monitoring Sep 04, 2026, 12:24 PM UTC
Microsoft has identified a specific anti-spam filtering model that is affecting a subset of email traffic. As an initial mitigation, Microsoft is allow-listing the affected IP addresses that were subject to throttling. They are also working to disable the filtering model responsible for the impact.
- investigating Sep 04, 2026, 12:24 PM UTC
Microsoft has identified a specific anti-spam filtering model that is affecting a subset of email traffic. As an initial mitigation, Microsoft is allow-listing the affected IP addresses that were subject to throttling. They are also working to disable the filtering model responsible for the impact.
- monitoring Sep 04, 2026, 02:08 PM UTC
Telemetry shows that the service is performing as expected for new emails and this is in line with organizations confirming that the issue no longer occurring. We're monitoring email queues and performing final validations to confirm the issue is fully resolved.
- monitoring Sep 04, 2026, 02:08 PM UTC
Telemetry shows that the service is performing as expected for new emails and this is in line with organizations confirming that the issue no longer occurring. We're monitoring email queues and performing final validations to confirm the issue is fully resolved.
- monitoring Sep 07, 2026, 05:51 PM UTC
Microsoft has mitigated the Exchange Online issue that caused delays or failures when receiving emails sent by Trimble. Email delivery has returned to normal, and no further impact is expected. This incident originated within the Microsoft 365 ecosystem and was not caused by Trimble systems or infrastructure.
- resolved Sep 07, 2026, 05:51 PM UTC
Microsoft has mitigated the Exchange Online issue that caused delays or failures when receiving emails sent by Trimble. Email delivery has returned to normal, and no further impact is expected. This incident originated within the Microsoft 365 ecosystem and was not caused by Trimble systems or infrastructure.
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