HI
"I have not been able to find my notes about this and am hoping that someone here can specify what the "inside network" command is for RWA."
what's your internal domain name for your server essential?(for example:wse2012.mydomain.local )
did you try to enter below url in your browser on internal network computer ?
https://<YourDomainName>/remote
https://wse2012.mydomain.local/remote
Use Remote Web Access in Windows Server Essentials
https://learn.microsoft.com/en-us/windows-server-essentials/use/use-remote-web-access-in-windows-server-essentials