MsDeploy is returning 403 forbidden

Web Deploy can give you a whole bunch of errors if not setup correctly. Do yourself a favour and use the Web Platform Installer (https://www.microsoft.com/web/downloads/platform.aspx). You should uninstall WebDeploy first if you've already tried to install it. From the WebPI select: "Web Deploy 3.6 for Hosting Servers".

If you go into IIS,
Click on the server node in the "Connections" list,
Double click "Management Service" then you are taken to a screen which has an "Enable remote connections" check box.
This checkbox (and the rest of the sreen) maybe greyed out because the service is running. Just click the "Stop" link in the Actions pane, then check the "Enable remote connections" box and any other settings you want to change here, then click 'Apply' and 'Start' on the Actions pane again.

That should hopefully let you connect, with proper credentials, to the service from a remote machine. (If the correct ports and stuff are opened and all that jazz.)

I think this helps your situation. At least you won't get 403's but you may have some other MsDeploy error.