Some users may have experienced delays in receiving notifications and placing or receiving calls in Microsoft Teams
ID: TM1275028
Issue type: Incident
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Impacted services
Microsoft Teams
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Details
Title: Some users may have experienced delays in receiving notifications and placing or receiving calls in Microsoft Teams
User impact: Users may have experienced delays in receiving notifications and placing or receiving calls in Microsoft Teams.
Final status: We've identified that a temporary spike in traffic to a backend registration service caused service instability. Once the temporary traffic increase subsided, the service recovered automatically without requiring manual intervention. Following a period of monitoring service telemetry, we’ve confirmed that impact has been fully remediated.
Scope of impact: Impact was specific to some users expecting to receive notifications or attempting to place or receive calls in Microsoft Teams.
Start time: Thursday, April 9, 2026, at 9:02 AM UTC
End time: Thursday, April 9, 2026, at 10:04 AM UTC
Root cause: A temporary spike in traffic to a backend registration service caused service instability.
Next steps:
- We’re reviewing safeguards to help prevent similar traffic spikes from impacting the service in the future.
This is the final update for the event.
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