![]() ![]() Authentication failed for this device, renew token or certificate and reconnect.Authorization rule '*' does not allow access for '*'.IotHub '*' does not contain the specified device '*'.Or, requests to IoT Hub fail with one of the following error messages: In logs, you may see a pattern of devices disconnecting with 401003 IoTHubUnauthorized, followed by 404104 DeviceConnectionClosedRemotely, and then successfully connecting shortly after. To resolve this error, ensure that each client connects to IoT Hub using its own identity. IoT Hub doesn't allow more than one client to connect using the same identity. This error occurs when another client creates a new connection to IoT Hub using the same identity, so IoT Hub closes the previous connection. Or, your device-to-cloud twin operation (such as read or patch reported properties) or direct method invocation fails with the error code 400027. You may see the 400027 ConnectionForcefullĺśślosedOnNewConnection error if your device disconnects and reports Communication_Error as the ConnectionStatusChangeReason using. 400027 Connection forcefully closed on new connection ![]() This article describes the causes and solutions for common error codes that you might encounter while using IoT Hub.
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