Final version: (NOTE THIS IS FOR JAMF SCHOOL ONLY) Profiles > DNS Proxy settings: <dict><key>site_key</key> <string>{YOURSITEKEY}</string> <key>host_name</key> <string>%Name%</string></dict>...
The context is adding iOS devices to DNSFilter and using Jamf School to manage the Proxy configuration.
<dict><key>site_key</key><string>YOURKEYHERE</string><key>host_name</key></dict> I was told to add the <key>host_name</key> by tech support.