I have a customer who is running Windows Server 2012 Standard. They have one physical server with two Hyper-V Virtual Machine Installations. One VM is their Domain Controller with DNS. The other VM is their Application server which they login to use a custom program that has a SQL Standard database. They have remote desktop services and licenses installed to allow remote desktop.
The customer is experiencing intermittent DNS issues where they will be connected to the Application Server and suddenly it will abruptly disconnect. If they attempt to reconnect via Remote Desktop, it will error out that client is not found. When this occurs they are also unable to navigate via their local web browser to any website by domain name.
How would you begin to troubleshoot this situation?