Fixed broken link

Author: KennedyDMSFT

articles/iot/iot-mqtt-connect-to-iot-hub.md

@@ -115,7 +115,7 @@ If a device can't use the device SDKs, it can still connect to the public device
   `SharedAccessSignature sig={signature-string}&se={expiry}&sr={URL-encoded-resourceURI}`
 
   > [!NOTE]
-  > If you use X.509 certificate authentication, SAS token passwords are not required. For more information, see [Tutorial: Create and upload certificates for testing](tutorial-x509-test-certs.md) and follow code instructions in the [TLS/SSL configuration section](#tlsssl-configuration).
+  > If you use X.509 certificate authentication, SAS token passwords are not required. For more information, see [Tutorial: Create and upload certificates for testing](../iot-hub/tutorial-x509-test-certs.md) and follow code instructions in the [TLS/SSL configuration section](#tlsssl-configuration).
 
   For more information about how to generate SAS tokens, see the [Use SAS tokens as a device](../iot-hub/iot-hub-dev-guide-sas.md#use-sas-tokens-as-a-device) section of [Control access to IoT Hub using Shared Access Signatures](../iot-hub/iot-hub-dev-guide-sas.md).