Broken link fixed

Author: pritamso

articles/iot-hub/tutorial-x509-introduction.md

@@ -39,7 +39,7 @@ Before starting any of the articles in this tutorial, you should be familiar wit
 
 Using a CA-signed certificate chain backed by a PKI to authenticate a device provides the best level of security for your devices:
 
-- In production, we recommend you get your X.509 CA certificates from a public root certificate authority. Purchasing a CA certificate has the benefit of the root CA acting as a trusted third party to vouch for the legitimacy of your devices. If you already have an X.509 CA certificate, and you know how to create and sign device certificates into a certificate chain, follow the instructions in [Tutorial: Upload and verify a CA certificate to IoT Hub](/tutorial-x509-prove-possession.md) to upload your CA certificate to your IoT hub. Then, follow the instructions in [Tutorial: Test certificate authentication](tutorial-x509-test-certificate.md) to authenticate a device with your IoT hub.
+- In production, we recommend you get your X.509 CA certificates from a public root certificate authority. Purchasing a CA certificate has the benefit of the root CA acting as a trusted third party to vouch for the legitimacy of your devices. If you already have an X.509 CA certificate, and you know how to create and sign device certificates into a certificate chain, follow the instructions in [Tutorial: Upload and verify a CA certificate to IoT Hub](tutorial-x509-prove-possession.md) to upload your CA certificate to your IoT hub. Then, follow the instructions in [Tutorial: Test certificate authentication](tutorial-x509-test-certificate.md) to authenticate a device with your IoT hub.
 
 - For testing purposes, we recommend using OpenSSL to create an X.509 certificate chain. OpenSSL is used widely across the industry to work with X.509 certificates. You can follow the steps in [Tutorial: Use OpenSSL to create test certificates](tutorial-x509-openssl.md) to create a root CA and intermediate CA certificate with which to create and sign device certificates. The tutorial also shows how to upload and verify a CA certificate. Then, follow the instructions in [Tutorial: Test certificate authentication](tutorial-x509-test-certificate.md) to authenticate a device with your IoT hub.
 
@@ -55,4 +55,4 @@ If you're already familiar with X.509 certificates, and you want to generate tes
     >[!IMPORTANT]
     >We recommend that you use certificates signed by an issuing Certificate Authority (CA), even for testing purposes. Never use self-signed certificates in production.
 
-If you have a root CA certificate or subordinate CA certificate and you want to upload it to your IoT hub, you must verify that you own that certificate. For more information, see [Tutorial: Upload and verify a CA certificate to IoT Hub](tutorial-x509-prove-possession.md).
+If you have a root CA certificate or subordinate CA certificate and you want to upload it to your IoT hub, you must verify that you own that certificate. For more information, see [Tutorial: Upload and verify a CA certificate to IoT Hub](tutorial-x509-prove-possession.md).