MECM client over CMG

Hi,

I have recently upgraded from MECM 1910 to 2002.  the client is deploying ok to intranet based devices, but no devices on CMG are getting the new client.  

Where do I go to troubleshoot this?

How can I force an install to a cmg connected device to test if that part works?

Note that I had CMG issues as part of the 2002 upgrade as per this post.   - https://techcommunity.microsoft.com/t5/system-center/cmg-broken-after-upgrade-to-mecm-2002-resolved/m-p/1472925?search-action-id=194926503841&search-result-uid=1472925 

also note that I had to redo the remove / re-add of the roles a second time after CMG stopped working again the night I did this fix.  

Point being, maybe my original issues are the cause of my client install issues.