Azure IoT Hub
An Azure service that enables bidirectional communication between internet of things (IoT) devices and applications.
1,340 questions
0 answers
Production devices disconnected from Azure IoT Hub - deprecated TLS 1.2 cipher no longer accepted
We respectfully request the following: Please investigate whether any TLS, cipher suite, certificate chain, or security policy changes were implemented on or around July 1, 2026 that could affect legacy TLS 1.2 clients. Please confirm whether strong…
Azure IoT Hub
asked 2026-07-03T09:09:07.8166667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(9.6, 10%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EGM%3C/text%3E%3C/svg%3E)
Greg Melson
0
Reputation points
edited the question 2026-07-03T10:22:36.41+00:00
Greg Melson
0
Reputation points
1 answer
Azure IoT hub TLS cipher no longer supported
Since around yesterday, our Azure IoT Hub has started refusing connections from our IoT devices. Based on the logs in Application Insights, the connections are being refused because the devices are using the TLS cipher TLS_RSA_WITH_AES_256_CBC_SHA256,…
Azure IoT Hub
Azure IoT Hub
An Azure service that enables bidirectional communication between internet of things (IoT) devices and applications.
1,340 questions
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(118.4, 18%, 21%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJS%3C/text%3E%3C/svg%3E)
1 answer
Devices lose connection to the Azure IoT Hub due to outdated TLS ciphers
Hello, We observed that since the night of June 30 to July 1, 2026, approximately half of our IoT devices currently deployed in the field have no longer been able to connect to the Azure IoT Hub. After a brief analysis, we were able to identify the root…
Azure IoT Hub
Azure IoT Hub
An Azure service that enables bidirectional communication between internet of things (IoT) devices and applications.
1,340 questions
asked 2026-07-02T13:44:09.82+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(156.8, 35%, 25%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EHF%3C/text%3E%3C/svg%3E)
Hoge, Florian
0
Reputation points
answered 2026-07-03T06:47:31.2233333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(86.4, 86%, 18%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMJ%3C/text%3E%3C/svg%3E)
Martin Jørgensen
76
Reputation points
0 answers
IOT Devices disconnect from IOT HUB post min TLS config change
A TLS config change wa push to the IOT hub at 7/1/2026, 7:46:07 AM. The config change in question was: "minTlsVersion": "1.2". Shortly after the config change all devices connected to the hub began to disconnect. The device modem…
Azure IoT Hub
Azure IoT Hub
An Azure service that enables bidirectional communication between internet of things (IoT) devices and applications.
1,340 questions
asked 2026-07-01T08:38:43.0233333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(288, 50%, 37%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ED%3C/text%3E%3C/svg%3E)
Denis
0
Reputation points
commented 2026-07-02T08:48:14.4266667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(6.4, 51%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EKV%3C/text%3E%3C/svg%3E)
Karnam Venkata Rajeswari
4,435
Reputation points Microsoft External Staff
Moderator
2 answers
One of the answers was accepted by the question author.
Azure IoT Hub TLS 1.3 Support
Hi, TLS 1.3 Support has been announced as a Preview feature. What will be the procedure to migrate to TLS 1.3 for existing IoT Hub instances and devices in the field. We are using the Device Provisioning service. Will TLS 1.3 endpoints will be added…
Azure IoT Hub
Azure IoT Hub
An Azure service that enables bidirectional communication between internet of things (IoT) devices and applications.
1,340 questions
asked 2026-06-17T16:04:29.78+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(214.4, 6%, 30%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESS%3C/text%3E%3C/svg%3E)
Stephane Simard
20
Reputation points
edited an answer 2026-06-22T19:58:33.04+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(28.799999999999997, 15%, 12%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAV%3C/text%3E%3C/svg%3E)
Anshika Varshney
14,085
Reputation points Microsoft External Staff
Moderator
1 answer
How can I design a scalable IoT architecture for real-time telemetry ingestion, edge processing, secure updates, and long-term analytics?
I’m building an IoT platform for thousands of field devices that send telemetry every few seconds, and I need help finalizing architecture. Requirements include secure device provisioning, mutual authentication, intermittent connectivity handling, edge…
Azure IoT Hub
Azure IoT Hub
An Azure service that enables bidirectional communication between internet of things (IoT) devices and applications.
1,340 questions
asked 2026-06-18T04:35:06.11+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(192, 26%, 28%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EH%3C/text%3E%3C/svg%3E)
HimanshuSinha
19,637
Reputation points Microsoft Employee
Moderator
answered 2026-06-18T04:35:42.43+00:00
AI answer
2 answers
Azure IOT Hub - Message Per second throttle limit
I need get a clarity on message that can be throttled per second to IOT hub without causing throttling error 429
Azure IoT Hub
Azure IoT Hub
An Azure service that enables bidirectional communication between internet of things (IoT) devices and applications.
1,340 questions
asked 2026-06-04T06:25:07.8133333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(316.8, 83%, 40%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAM%3C/text%3E%3C/svg%3E)
Alen Mathew
0
Reputation points
commented 2026-06-11T14:29:27.52+00:00
Anshika Varshney
14,085
Reputation points Microsoft External Staff
Moderator
2 answers
Embedded devices fail to connect to blob.core.windows.net after certificate chain change. Is IoT Hub next?
Recently the certificate chain on blob.core.windows.net was changed from a chain depth of 2 to three, the handshake size went from 3k to ~10k . I have embedded devices in the field, connected to Azure IoT hub that are using the Digicert Global G2 cert to…
Azure IoT Hub
Azure IoT Hub
An Azure service that enables bidirectional communication between internet of things (IoT) devices and applications.
1,340 questions
asked 2026-05-19T08:01:41.31+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(208, 48%, 30%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EKW%3C/text%3E%3C/svg%3E)
Kristoffer Wilhelmsson
0
Reputation points
commented 2026-06-08T09:59:05.14+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(268.8, 74%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJT%3C/text%3E%3C/svg%3E)
Jan Tore Guggedal
0
Reputation points
1 answer
Azure IotHub TLS 1.2 Supported cipher suites
Tonight we encountered an issue with our IotHub where ~1500 devices could not connect anymore. Our IotHub is currently operating under a temporary exception for legacy TLS 1.0 version. Only then we noticed that this subset of our devices support TLS1.2…
Azure IoT Hub
Azure IoT Hub
An Azure service that enables bidirectional communication between internet of things (IoT) devices and applications.
1,340 questions
asked 2026-04-22T08:29:40.3266667+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(9.6, 13%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EGS%3C/text%3E%3C/svg%3E)
Georg Sieber
45
Reputation points
edited an answer 2026-06-08T08:11:34.73+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(204.8, 15%, 29%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMM%3C/text%3E%3C/svg%3E)
Manas Mohanty
17,270
Reputation points Microsoft External Staff
Moderator
1 answer
IoT Device Connectivity Intermittently Failing with Azure IoT Hub
We are experiencing intermittent connectivity issues between IoT devices and Azure IoT Hub. Devices that were previously connected are unexpectedly getting disconnected and failing to reconnect reliably. Observed Behavior: Devices randomly disconnect…
Azure IoT Hub
Azure IoT Hub
An Azure service that enables bidirectional communication between internet of things (IoT) devices and applications.
1,340 questions
asked 2026-06-02T15:10:02.2033333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(102.4, 10%, 19%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESM%3C/text%3E%3C/svg%3E)
Sai Manasa Ivaturi
0
Reputation points Microsoft Employee
answered 2026-06-03T06:51:11.0366667+00:00
Jerald Felix
16,015
Reputation points
Volunteer Moderator
2 answers
Intermittent Telemetry Loss in IoT Device Hub – Messages Not Reaching Endpoint
I’m encountering an issue with an IoT solution where device telemetry is intermittently not being delivered to the configured backend endpoint. Scenario: Devices are connected to an IoT Hub and sending telemetry at regular intervals. Message routing…
Azure IoT Hub
Azure IoT Hub
An Azure service that enables bidirectional communication between internet of things (IoT) devices and applications.
1,340 questions
asked 2026-05-27T20:59:33.67+00:00
Sai Manasa Ivaturi
0
Reputation points Microsoft Employee
answered 2026-05-27T22:00:22.6066667+00:00
Karnam Venkata Rajeswari
4,435
Reputation points Microsoft External Staff
Moderator
1 answer
Using STMicroelectronics B-L475E-IOT01A Discovery kit to connect to IOT Hub but getting 0x00010085 Auth error.
I am following the Azure tutorial using the B-L475E-IOT01A Discovery kit to connect to IOT Hub via MQTT. Tutorial: https://learn.microsoft.com/en-us/previous-versions/azure/iot/tutorial-devkit-stm-b-l475e-iot-hub I pulled the example source from git…
Azure IoT Hub
Azure IoT Hub
An Azure service that enables bidirectional communication between internet of things (IoT) devices and applications.
1,340 questions
asked 2026-05-22T21:52:38.22+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(188.79999999999998, 18%, 28%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EWC%3C/text%3E%3C/svg%3E)
West Coast John
0
Reputation points
answered 2026-05-22T21:52:52.5633333+00:00
AI answer
2 answers
One of the answers was accepted by the question author.
How is device twin data telemetery data on built in endpoint secured in IoTHub
We have a requirement to store data at rest encrypted. I cannot find documentation of how the data in IoTHub is stored: I found these questions: https://stackoverflow.com/questions/65682085/store-secrets-in-devicetwin …
Azure IoT Hub
Azure IoT Hub
An Azure service that enables bidirectional communication between internet of things (IoT) devices and applications.
1,340 questions
asked 2026-05-12T14:18:55.47+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(12.8, 24%, 11%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMF%3C/text%3E%3C/svg%3E)
Mike Finch
40
Reputation points
commented 2026-05-21T11:57:17.34+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(176, 16%, 27%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESC%3C/text%3E%3C/svg%3E)
SRILAKSHMI C
19,550
Reputation points Microsoft External Staff
Moderator
1 answer
Microsoft.DeviceUpdate RP stuck in 'Registering' state — all instance creates fail with InternalServerError
We are unable to create any new Microsoft.DeviceUpdate/accounts/instances resources in our subscription. Every attempt — via Bicep, ARM, Azure CLI, and the Azure Portal — fails with the same opaque error: { "code":…
Azure IoT Hub
Azure IoT Hub
An Azure service that enables bidirectional communication between internet of things (IoT) devices and applications.
1,340 questions
asked 2026-04-30T18:27:03.86+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(147.20000000000002, 74%, 24%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EKK%3C/text%3E%3C/svg%3E)
Kensei Kawamura
80
Reputation points Microsoft Employee
commented 2026-05-19T18:11:17.0666667+00:00
Manas Mohanty
17,270
Reputation points Microsoft External Staff
Moderator
2 answers
What is device twin in Azure IoT Hub? — JSON state for device sync
I am trying to understand the concept of device twins in Azure IoT Hub, specifically how they are used to maintain and synchronize device state between cloud applications and IoT devices using a JSON-based structure. Environment Details Azure Service:…
Azure IoT Hub
Azure IoT Hub
An Azure service that enables bidirectional communication between internet of things (IoT) devices and applications.
1,340 questions
asked 2026-05-14T18:45:23.6433333+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(147.20000000000002, 49%, 24%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDS%3C/text%3E%3C/svg%3E)
Dhruvesh Sheladiya
0
Reputation points Microsoft Employee
answered 2026-05-14T19:56:27.7233333+00:00
Karnam Venkata Rajeswari
4,435
Reputation points Microsoft External Staff
Moderator
2 answers
How is security managed in Azure IoT Hub? — SAS tokens & X.509 authentication used
Description I am trying to understand how Azure IoT Hub manages device-level security and authentication, specifically how mechanisms like SAS tokens and X.509 certificates are used to securely connect and authorize devices. Environment Details Azure…
Azure IoT Hub
Azure IoT Hub
An Azure service that enables bidirectional communication between internet of things (IoT) devices and applications.
1,340 questions
asked 2026-05-14T18:43:38.0366667+00:00
Dhruvesh Sheladiya
0
Reputation points Microsoft Employee
answered 2026-05-14T19:54:44.16+00:00
Karnam Venkata Rajeswari
4,435
Reputation points Microsoft External Staff
Moderator
1 answer
How is security managed in Azure IoT Hub? — SAS tokens & X.509 authentication used
Description I am trying to understand how Azure IoT Hub manages security for device connectivity and communication, specifically how authentication mechanisms like SAS tokens and X.509 certificates are used to secure device-to-cloud…
Azure IoT Hub
Azure IoT Hub
An Azure service that enables bidirectional communication between internet of things (IoT) devices and applications.
1,340 questions
asked 2026-05-14T18:24:00.4566667+00:00
Dhruvesh Sheladiya
0
Reputation points Microsoft Employee
commented 2026-05-14T18:44:57.7266667+00:00
Karnam Venkata Rajeswari
4,435
Reputation points Microsoft External Staff
Moderator
2 answers
What protocols does Azure IoT Hub support? — MQTT, AMQP, HTTPS support
Description I am trying to understand the communication protocols supported by Azure IoT Hub for device-to-cloud and cloud-to-device messaging, and how each protocol behaves in different scenarios such as scalability, latency, and network…
Azure IoT Hub
Azure IoT Hub
An Azure service that enables bidirectional communication between internet of things (IoT) devices and applications.
1,340 questions
asked 2026-05-14T18:22:28.25+00:00
Dhruvesh Sheladiya
0
Reputation points Microsoft Employee
answered 2026-05-14T18:43:30.6966667+00:00
Karnam Venkata Rajeswari
4,435
Reputation points Microsoft External Staff
Moderator
2 answers
How does Azure IoT Hub handle devices and what authentication does it use?
Question How does Azure IoT Hub handle devices and what authentication does it use? Description I am trying to understand how Azure IoT Hub manages device connectivity and authentication in an IoT solution, specifically how devices are registered,…
Azure IoT Hub
Azure IoT Hub
An Azure service that enables bidirectional communication between internet of things (IoT) devices and applications.
1,340 questions
asked 2026-05-14T18:20:50.4566667+00:00
Dhruvesh Sheladiya
0
Reputation points Microsoft Employee
answered 2026-05-14T18:42:07.18+00:00
Karnam Venkata Rajeswari
4,435
Reputation points Microsoft External Staff
Moderator
3 answers
How to connect Azure IoT hub?
Issue Details Devices are successfully connected to IoT Hub. Telemetry messages are being received (validated via IoT Hub metrics). Message routing is configured to forward data to Data Lake. However, no files/blobs are being created in the Data Lake…
Azure IoT Hub
Azure IoT Hub
An Azure service that enables bidirectional communication between internet of things (IoT) devices and applications.
1,340 questions
asked 2026-05-14T18:18:56.38+00:00
Dhruvesh Sheladiya
0
Reputation points Microsoft Employee
answered 2026-05-14T18:40:31.5+00:00
Karnam Venkata Rajeswari
4,435
Reputation points Microsoft External Staff
Moderator