Remote Desktop : Your Computer can’t connect to the remote computer because a security package error occurred in transport layer.

This was/is one of the strangest issues that I have ever come across.  You try to connect to remote server and it does connect and the following error message is returned. 

Your Computer can’t connect to the remote computer because a security package error occurred in transport layer.

After a recent windows update the cached credentials no longer work.

To fix the issue delete/clear the cached credentials under the remote gateway settings.

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