Merge pull request #235828 from greg-lindsay/appgw-upd

Github issue 56453

Author: prmerger-automator[bot]

articles/application-gateway/ssl-overview.md

@@ -36,6 +36,8 @@ For the TLS connection to work, you need to ensure that the TLS/SSL certificate
 - That the current date and time is within the "Valid from" and "Valid to" date range on the certificate.
 - That the certificate's "Common Name" (CN) matches the host header in the request. For example, if the client is making a request to `https://www.contoso.com/`, then the CN must be `www.contoso.com`.
 
+If you have errors with the backend certificate common name (CN), see [Backend certificate invalid common name (CN)](application-gateway-backend-health-troubleshooting.md#backend-certificate-invalid-common-name-cn).  
+
 ### Certificates supported for TLS termination
 
 Application gateway supports the following types of certificates: