Azure IoT Hub Skill

This skill provides expert guidance for Azure IoT Hub. Covers troubleshooting, best practices, decision making, architecture & design patterns, limits & quotas, security, configuration, integrations & coding patterns, and deployment. It combines local quick-reference content with remote documentation fetching capabilities.

How to Use This Skill

IMPORTANT for Agent: Use the Category Index below to locate relevant sections. For categories with line ranges (e.g., L35-L120), use read_file with the specified lines. For categories with file links (e.g., [security.md](security.md)), use read_file on the linked reference file

IMPORTANT for Agent: If metadata.generated_at is more than 3 months old, suggest the user pull the latest version from the repository. If mcp_microsoftdocs tools are not available, suggest the user install it: Installation Guide

This skill requires network access to fetch documentation content:

• Preferred: Use mcp_microsoftdocs:microsoft_docs_fetch with query string from=learn-agent-skill. Returns Markdown.
• Fallback: Use fetch_webpage with query string from=learn-agent-skill&accept=text/markdown. Returns Markdown.

Category Index

Category	Lines	Description
Troubleshooting	L37-L52	Diagnosing and fixing IoT Hub and DPS issues: device connectivity, routing, error codes, Device Update/import/storage/proxy problems, and collecting/using diagnostic and debug logs.
Best Practices	L53-L62	Best practices for secure, scalable IoT Hub/DPS deployments: device provisioning at scale, OEM security, cert renewal/ADR, resilient reconnection, auto device config, and IoT Hub hardening.
Decision Making	L63-L75	Guidance for choosing IoT Hub vs alternatives, tiers/scale, pricing, routing, comms patterns (C2D/D2C), monitoring methods, and when to use or disable disaster recovery.
Architecture & Design Patterns	L76-L82	Design patterns for DPS lifecycle/HA/DR, VNet connectivity, secure device streams, and reliably persisting ordered IoT Hub events with Cosmos DB.
Limits & Quotas	L83-L89	Details on IoT Hub, Device Provisioning Service, and Device Update limits, quotas, and throttling behavior, including scale constraints and how services behave when limits are reached.
Security	L90-L128	Securing IoT Hub, DPS, and Device Update: auth (Entra ID, RBAC, SAS, X.509), certificates and revocation, TLS/ciphers, keys, network/IP controls, private endpoints, and Azure Policy compliance.
Configuration	L129-L167	Configuring IoT Hub and DPS: enroll devices, manage certificates and ADR, set twins, jobs, routing, endpoints, file upload, message enrichments, queries, and monitoring/metrics/logs.
Integrations & Coding Patterns	L168-L192	Patterns and code samples for connecting devices/DPS to IoT Hub (MQTT/HTTPS/AMQP), managing identities/twins/files, direct methods, C2D messages, bulk ops, and message formats.
Deployment	L193-L204	Deploying and updating IoT Hubs and devices: region/SKU migration, failover, ARM/Bicep deployments, Device Update (image/package, proxy, OS support), and scheduling jobs via CLI.

Troubleshooting

Topic	URL
Diagnose and fix common Azure DPS provisioning errors	https://learn.microsoft.com/en-us/azure/iot-dps/how-to-troubleshoot-dps
Use Agent Check to diagnose missing Device Update devices	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-agent-check
Use Device Update diagnostics, error codes, and logs	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-diagnostics
Interpret Device Update for IoT Hub error codes	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-error-codes
Collect and review Device Update diagnostic logs remotely	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-log-collection
Resolve proxy update import errors in Device Update	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-proxy-update-troubleshooting
Diagnose and fix common Device Update issues	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/troubleshoot-device-update
Fix storage permission errors when importing Device Updates	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/troubleshoot-storage
Collect device debug logs using IoT SDKs	https://learn.microsoft.com/en-us/azure/iot-hub/how-to-collect-device-logs
Diagnose and fix Azure IoT Hub device connectivity	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-troubleshoot-connectivity
Resolve Azure IoT Hub error codes	https://learn.microsoft.com/en-us/azure/iot-hub/troubleshoot-error-codes
Troubleshoot Azure IoT Hub message routing issues	https://learn.microsoft.com/en-us/azure/iot-hub/troubleshoot-message-routing

Best Practices

Topic	URL
Apply DPS best practices for large-scale IoT deployments	https://learn.microsoft.com/en-us/azure/iot-dps/concepts-deploy-at-scale
Implement OEM security practices for DPS-enabled devices	https://learn.microsoft.com/en-us/azure/iot-dps/concepts-device-oem-security-practices
Plan and execute IoT certificate renewal with ADR	https://learn.microsoft.com/en-us/azure/iot-hub/concept-certificate-renewal
Design resilient Azure IoT Hub device reconnection	https://learn.microsoft.com/en-us/azure/iot-hub/concepts-manage-device-reconnections
Apply IoT Hub automatic device configuration best practices	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-configuration-best-practices
Apply security best practices to Azure IoT Hub	https://learn.microsoft.com/en-us/azure/iot-hub/secure-azure-iot-hub

Decision Making

Topic	URL
Decide when to disable IoT Hub disaster recovery	https://learn.microsoft.com/en-us/azure/iot-hub/how-to-disable-dr
Choose between Azure IoT Hub and Event Hubs	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-compare-event-hubs
Choose IoT Hub cloud-to-device communication option	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-c2d-guidance
Choose IoT Hub device-to-cloud communication option	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-d2c-guidance
Understand Azure IoT Hub pricing and metering	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-pricing
Decide between IoT Hub routing and Event Grid	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-event-grid-routing-comparison
Select the right Azure IoT Hub tier and scale	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-scaling
Select and upgrade Azure IoT Hub tier and size	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-upgrade
Choose IoT Hub device connection monitoring method	https://learn.microsoft.com/en-us/azure/iot-hub/monitor-device-connection-state

Architecture & Design Patterns

Topic	URL
Plan DPS device lifecycle and reprovisioning policies	https://learn.microsoft.com/en-us/azure/iot-dps/concepts-device-reprovision
Design DPS high availability and disaster recovery	https://learn.microsoft.com/en-us/azure/iot-dps/iot-dps-ha-dr
Use virtual network connectivity patterns with DPS	https://learn.microsoft.com/en-us/azure/iot-dps/virtual-network-support

Limits & Quotas

Topic	URL
Azure IoT DPS FAQs on limits and behavior	https://learn.microsoft.com/en-us/azure/iot-dps/dps-faq
Review Azure Device Update service limits	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-limits
Azure IoT Hub quotas, limits, and throttling behavior	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-quotas-throttling

Security

Topic	URL
Secure DPS APIs using Microsoft Entra ID and RBAC	https://learn.microsoft.com/en-us/azure/iot-dps/concepts-control-access-dps-azure-ad
Configure DPS access control with SAS tokens	https://learn.microsoft.com/en-us/azure/iot-dps/how-to-control-access
Revoke or disenroll device access in DPS securely	https://learn.microsoft.com/en-us/azure/iot-dps/how-to-revoke-device-access-portal
Roll and update X.509 certificates in DPS	https://learn.microsoft.com/en-us/azure/iot-dps/how-to-roll-certificates
Deprovision DPS devices and revoke IoT Hub access	https://learn.microsoft.com/en-us/azure/iot-dps/how-to-unprovision-devices
Verify X.509 CA certificates with DPS proof-of-possession	https://learn.microsoft.com/en-us/azure/iot-dps/how-to-verify-certificates
Configure IP filtering rules for Azure IoT DPS	https://learn.microsoft.com/en-us/azure/iot-dps/iot-dps-ip-filtering
Manage public network access and private endpoints for DPS	https://learn.microsoft.com/en-us/azure/iot-dps/public-network-access
Configure TLS versions and ciphers for DPS connections	https://learn.microsoft.com/en-us/azure/iot-dps/tls-support
Assign RBAC roles for Device Update and IoT Hub	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/configure-access-control-device-update
Set up private endpoints for Device Update accounts	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/configure-private-endpoints
Configure RBAC and Entra auth for Device Update	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-control-access
Configure data encryption and CMKs for Device Update	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-data-encryption
Configure network ports for Device Update traffic	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-networking
Prepare for Device Update root key rotations	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-rootkey
Understand end-to-end security in Device Update	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-security
Configure network security and private access for Device Update	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/network-security
Secure IoT Hub APIs with Microsoft Entra ID and RBAC	https://learn.microsoft.com/en-us/azure/iot-hub/authenticate-authorize-azure-ad
Control IoT Hub access with SAS tokens	https://learn.microsoft.com/en-us/azure/iot-hub/authenticate-authorize-sas
Authenticate IoT Hub devices with X.509 certificates	https://learn.microsoft.com/en-us/azure/iot-hub/authenticate-authorize-x509
Manage certificate revocation and policies for IoT Hub	https://learn.microsoft.com/en-us/azure/iot-hub/concepts-certificate-policy-management
Manage IoT Hub device identities and connection strings	https://learn.microsoft.com/en-us/azure/iot-hub/create-connect-device
Revoke device certificates and clean up ADR policies	https://learn.microsoft.com/en-us/azure/iot-hub/how-to-revoke-certificate-delete-policy
Use Azure IoT Hub identity registry for device management	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-identity-registry
Configure IP filtering rules for Azure IoT Hub	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-ip-filtering
Use managed identities with Azure IoT Hub egress	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-managed-identity
Manage public network access for Azure IoT Hub	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-public-network-access
Restrict IoT Hub outbound network access for DLP	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-restrict-outbound-network-access
TLS versions and cipher requirements for IoT Hub	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-tls-support
Migrate IoT Hub TLS root certificate to DigiCert G2	https://learn.microsoft.com/en-us/azure/iot-hub/migrate-tls-certificate
Built-in Azure Policy definitions for IoT Hub	https://learn.microsoft.com/en-us/azure/iot-hub/policy-reference
Regenerate IoT Hub shared access keys safely	https://learn.microsoft.com/en-us/azure/iot-hub/regenerate-keys
Azure Policy compliance controls for IoT Hub	https://learn.microsoft.com/en-us/azure/iot-hub/security-controls-policy
Create and upload X.509 test certificates for IoT Hub	https://learn.microsoft.com/en-us/azure/iot-hub/tutorial-x509-test-certs
Connect Azure IoT Hub with virtual networks securely	https://learn.microsoft.com/en-us/azure/iot-hub/virtual-network-support

Configuration

Topic	URL
Manage DPS device enrollments in Azure portal	https://learn.microsoft.com/en-us/azure/iot-dps/how-to-manage-enrollments
Link and manage IoT hubs in DPS	https://learn.microsoft.com/en-us/azure/iot-dps/how-to-manage-linked-iot-hubs
Configure DPS allocation policies across IoT hubs	https://learn.microsoft.com/en-us/azure/iot-dps/how-to-use-allocation-policies
Query and manage DPS instance IP address properties	https://learn.microsoft.com/en-us/azure/iot-dps/iot-dps-understand-ip-address
Reference for Azure DPS monitoring metrics and logs	https://learn.microsoft.com/en-us/azure/iot-dps/monitor-iot-dps-reference
Create apt manifests for package-based Device Updates	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-apt-manifest
Configure adu-config.json for Device Update agents	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-configuration-file
Configure multistep execution in Device Update manifests	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-multi-step-updates
Author JSON import manifests for Device Update	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/import-schema
Configure related files in Device Update import manifests	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/related-files
Define update manifest payloads for Device Update	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/update-manifest
Configure ADR credential for Microsoft-backed certificates	https://learn.microsoft.com/en-us/azure/iot-hub/how-to-configure-credential
Create or edit Microsoft-root CA policy in ADR	https://learn.microsoft.com/en-us/azure/iot-hub/how-to-create-policy
Configure ADR policy with external root CA	https://learn.microsoft.com/en-us/azure/iot-hub/how-to-create-policy-external-certificate
Disable or enable IoT devices in Azure Device Registry	https://learn.microsoft.com/en-us/azure/iot-hub/how-to-disable-enable-device
Configure IoT Hub file upload to Azure Storage	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-configure-file-upload
Handle customer data requests for IoT Hub devices	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-customer-data-requests
Understand and configure Azure IoT Hub device twins	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-device-twins
Configure and use IoT Hub direct methods	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-direct-methods
Configure and use Azure IoT Hub device and service endpoints	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-endpoints
Use IoT Hub file upload for large device data	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-file-upload
Configure and manage Azure IoT Hub jobs for device fleets	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-jobs
Configure cloud-to-device messaging in IoT Hub	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-messages-c2d
Configure IoT Hub device-to-cloud message routing	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-messages-d2c
Understand and configure Azure IoT Hub module twins	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-module-twins
Configure IoT Hub communication protocols and ports	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-protocols
Use IoT Hub message routing query language	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-routing-query-syntax
Deploy IoT Hub with ADR and certificate management	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-device-registry-setup
Configure message enrichments in Azure IoT Hub	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-message-enrichments-overview
Non-telemetry event schemas for Azure IoT Hub	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-non-telemetry-event-schema
Understand and manage Azure IoT Hub IP addresses	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-understand-ip-address
Manage IoT Hub device and module twins via portal and CLI	https://learn.microsoft.com/en-us/azure/iot-hub/manage-device-twins
Reference metrics and logs for monitoring Azure IoT Hub	https://learn.microsoft.com/en-us/azure/iot-hub/monitor-iot-hub-reference
Use the Azure IoT Hub VS Code extension	https://learn.microsoft.com/en-us/azure/iot-hub/reference-iot-hub-extension
Set up and use IoT Hub message enrichments	https://learn.microsoft.com/en-us/azure/iot-hub/tutorial-message-enrichments

Integrations & Coding Patterns

Topic	URL
Send additional payload data between devices and DPS	https://learn.microsoft.com/en-us/azure/iot-dps/how-to-send-additional-data
Use raw HTTPS with DPS symmetric key provisioning	https://learn.microsoft.com/en-us/azure/iot-dps/iot-dps-https-sym-key-support
Use raw HTTPS with DPS X.509 certificate provisioning	https://learn.microsoft.com/en-us/azure/iot-dps/iot-dps-https-x509-support
Connect devices to Azure IoT DPS over MQTT	https://learn.microsoft.com/en-us/azure/iot-dps/iot-mqtt-connect-to-iot-dps
Programmatically create DPS TPM individual enrollments	https://learn.microsoft.com/en-us/azure/iot-dps/quick-enroll-device-tpm
Programmatically create DPS X.509 enrollment groups	https://learn.microsoft.com/en-us/azure/iot-dps/quick-enroll-device-x509
Implement Device Update component enumerator via proxy	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/components-enumerator
Send and receive IoT Hub cloud-to-device messages with SDKs	https://learn.microsoft.com/en-us/azure/iot-hub/how-to-cloud-to-device-messaging
Implement device management actions using IoT Hub direct methods	https://learn.microsoft.com/en-us/azure/iot-hub/how-to-device-management
Use IoT Hub device and service SDKs with device twins	https://learn.microsoft.com/en-us/azure/iot-hub/how-to-device-twins
Upload device files to cloud using IoT Hub SDKs	https://learn.microsoft.com/en-us/azure/iot-hub/how-to-file-upload
Use module identities and twins with IoT Hub	https://learn.microsoft.com/en-us/azure/iot-hub/how-to-module-twins
Use IoT Hub service SDK to schedule broadcast jobs	https://learn.microsoft.com/en-us/azure/iot-hub/how-to-schedule-broadcast-jobs
Use AMQP protocol with Azure IoT Hub endpoints	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-amqp-support
Bulk import and export IoT Hub device identities	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-bulk-identity-mgmt
Construct Azure IoT Hub message formats	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-messages-construct
Read IoT Hub messages from built-in endpoint	https://learn.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-messages-read-builtin
Connect devices to Azure IoT Hub using MQTT	https://learn.microsoft.com/en-us/azure/iot-hub/iot-mqtt-connect-to-iot-hub
Control IoT devices via direct methods using .NET samples	https://learn.microsoft.com/en-us/azure/iot-hub/quickstart-control-device
Use PowerShell script to self-sign IoT Hub CSR certificates	https://learn.microsoft.com/en-us/azure/iot-hub/reference-self-sign-script
Connect IoT devices to Azure IoT Hub via MQTT	https://learn.microsoft.com/en-us/azure/iot-hub/tutorial-use-mqtt

Deployment

Topic	URL
Perform proxy updates with Device Update for IoT Hub	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-howto-proxy-updates
Deploy image-based Device Update on Raspberry Pi	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-raspberry-pi
Use regional failover mappings for Device Update	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-region-mapping
Deploy package-based Device Update with Ubuntu agent	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/device-update-ubuntu-agent
Check OS and component support for Device Update	https://learn.microsoft.com/en-us/azure/iot-hub-device-update/support
Manually migrate Azure IoT Hub across regions or SKUs	https://learn.microsoft.com/en-us/azure/iot-hub/migrate-hub-arm
Migrate Azure IoT Hub using Azure CLI state commands	https://learn.microsoft.com/en-us/azure/iot-hub/migrate-hub-state-cli
Schedule IoT Hub jobs for device groups using Azure CLI	https://learn.microsoft.com/en-us/azure/iot-hub/schedule-jobs-cli
Perform manual failover for an Azure IoT hub	https://learn.microsoft.com/en-us/azure/iot-hub/tutorial-manual-failover