We are moving our users to gmail. We have google apps for enterprise and use GADS to sync with our active directory. I am looking to set up mail lists based on active directory. I was setting up groups with the users that belong in each mail list. I am not sure if this is what I should be doing. I have a parent group with sub groups. It appears that when I went to run the test sync only the users from the parent group were synced. I also noticed that groups that already exist would be deleted. Would I have to add each group that exists to the exclusion list?