| author | SoniaLopezBravo |
|---|---|
| ms.service | azure-iot-hub |
| ms.topic | include |
| ms.date | 03/06/2024 |
| ms.author | sonialopez |
| ms.subservice | azure-iot-hub-dps |
The following table lists the limits that apply to Azure IoT Hub Device Provisioning Service resources.
| Resource | Limit |
|---|---|
| Maximum device provisioning services per Azure subscription | 10 |
| Maximum number of registrations | 1,000,000 |
| Maximum number of individual enrollments | 1,000,000 |
| Maximum number of enrollment groups (X.509 certificate) | 100 |
| Maximum number of enrollment groups (symmetric key) | 100 |
| Maximum number of CAs | 25 |
| Maximum number of linked IoT hubs | 50 |
| Maximum size of message | 96 KB |
Tip
If the hard limit on symmetric key enrollment groups is a blocking issue, use individual enrollments as a workaround.
The Device Provisioning Service has the following rate limits.
| Rate | Per-unit value |
|---|---|
| Operations | 1,000/min/service |
| Device registrations | 1,000/min/service |
| Device polling operation | 5/10 sec/device |