RDWeb RD Gateway Issue

I am working on setting up RDWeb access so a client can access an internal application but having an issue with the RDWeb configuration.  

 Issue 1 -
 When I run the Best Practices Analyzer on the Remote Desktop Services Role, the only issue it finds is that there is an issue with the SSL cert.  Message "The RD Gateway server must be configured to use a valid SSL certificate"  

 The certificate is valid and when I look at it in the RD Gateway console and the Certificate MMC SnapIn.  

 Issue 2 -
 When accessing the applications made available in RemoteApps, they open fine internally.  When accessing from another subnet externally, it gives the message "The remote computer could not be found".

Greatly appreciate any help I can get here as I'm running up against a deadline on this project.

 Images Attached:
   1 - Best Practices Analyzer message
   2 - RD Gateway properties on SSL Tab
   3 - Certificate from MMC Snap In
Capture1.JPG
Capture2.JPG
Capture3.JPG
Jeremy_PimerAsked:
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MaheshArchitectCommented:
Certificate is valid.
Ensure that you are using RD gateway public DNS FQDN (marketinsight.advisen.com  - the name of certificate) in RDP connection properties for internet based clients, otherwise it will not be able to connect to RD Gateway
That is why you are also getting certificate warning because you are not using FQDN of RD Gateway
Also ensure that RD gateway server is published on internet and TCP 443 is allowed from internet to server public IP
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