Connected cache with 1910 ConfigMgr

Hi All

Has anyone configured connected cache with ConfigMgr?

Found some useful articles to help me get started. e.g. https://techcommunity.microsoft.com/t5/core-infrastructure-and-security/modern-content-distribution-microsoft-endpoint-manager-and/ba-p/1148669 Started of by using an existing DP and enabling connected cache, this was fine, I could see the ARR in IIS being setup and registry entries appearing on the server.

However I have had issues getting the client to talk through DO. I have ensured the client is within a boundary group that the Connected cache DO is able to see and aware of the GPO that needs to be configured for delivery optimisation. 

When running the Get-DeliveryOptimizationStatus on the client it returns no results. What am I missing??

One question, my machines are hybrid Azure AD joined and we do some management in Intune, is it sufficient enough to create an MDM Delivery optimisation policy or does a GPO also need to be created?

Many Thanks