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This article describes the causes and solutions for 403002 IoTHubQuotaExceeded errors.
Symptoms
All requests to IoT Hub fail with the error 403002 IoTHubQuotaExceeded. In Azure portal, the IoT hub device list doesn't load.
Cause
The daily message quota for the IoT hub is exceeded.
Solution
Upgrade or increase the number of units on the IoT hub or wait for the next UTC day for the daily quota to refresh.
Next steps
- To understand how operations are counted toward the quota, such as twin queries and direct methods, see Understand IoT Hub pricing
- To set up monitoring for daily quota usage, set up an alert with the metric Total number of messages used. For step-by-step instructions, see Set up metrics and alerts with IoT Hub