Forum Discussion
SCCM CMG Windows Updates
nikeshmistry Great question thank you. Depending on how you have your boundary fallback setup your devices could be set up to get content from on-prem DPs.
A cleaner option might be to set the "Prefer cloud based sources over on-premise sources" option on your VPN boundary which will rearrange your order of content acquisition preference so that the CMG would be first. In this way you could associate both the on-prem DP and CMG with your VPN boundary and the app content which isn't available on the CMG would be acquired from the DP.
Check out Rob's other blog on boundaries for more information: https://techcommunity.microsoft.com/t5/configuration-manager-blog/managing-remote-machines-with-cloud-management-gateway-in/ba-p/1233895
Finally, make sure you have considered letting clients get Windows Update content directly from the Windows Update service rather than publishing that content to your CMG. It could be more performant and would definitely be cheaper.