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Copy file name to clipboardExpand all lines: includes/iot-dps-limits.md
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author: kgremban
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ms.service: iot-dps
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ms.topic: include
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ms.date: 10/10/2021
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ms.date: 03/06/2024
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ms.author: kgremban
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---
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> [!NOTE]
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> Some areas of this service have adjustable limits. This is represented in the tables below with the *Adjustable?* column. When the limit can be adjusted, the *Adjustable?* value is *Yes*.
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>The actual value to which a limit can be adjusted may vary based on each customer’s deployment. Multiple instances of DPS may be required for very large deployments.
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> If your business requires raising an adjustable limit or quota above the default limit, you can submit a request for additional resources by [opening a support ticket](https://portal.azure.com/#blade/Microsoft_Azure_Support/HelpAndSupportBlade/newsupportrequest). **Requesting an increase does not guarantee that it will be granted, as it needs to be reviewed on a case-by-case basis. Please contact Microsoft support as early as possible during your implementation, to be able to determine if your request could be approved and plan accordingly.**
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The following table lists the limits that apply to Azure IoT Hub Device Provisioning Service resources.
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| Resource | Limit | Adjustable? |
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| --- | --- | --- |
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| Maximum device provisioning services per Azure subscription | 10 |Yes|
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| Maximum number of registrations | 1,000,000 |Yes|
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| Maximum number of individual enrollments | 1,000,000 |Yes|
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| Maximum number of enrollment groups *(X.509 certificate)*| 100 |Yes|
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| Maximum device provisioning services per Azure subscription | 10 |No|
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| Maximum number of registrations | 1,000,000 |No|
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| Maximum number of individual enrollments | 1,000,000 |No|
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| Maximum number of enrollment groups *(X.509 certificate)*| 100 |No|
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| Maximum number of enrollment groups *(symmetric key)*| 100 | No |
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| Maximum number of CAs | 25 |Yes|
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| Maximum number of CAs | 25 |No|
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| Maximum number of linked IoT hubs | 50 | No |
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| Maximum size of message | 96 KB| No |
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| Rate | Per-unit value | Adjustable? |
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| --- | --- | --- |
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| Operations | 1,000/min/service |Yes|
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| Device registrations | 1,000/min/service |Yes|
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| Operations | 1,000/min/service |No|
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| Device registrations | 1,000/min/service |No|
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| Device polling operation | 5/10 sec/device | No |
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