Now that your Google Apps domain is integrated with ClassLink, import your groups! Group import Google Apps groups are no different than importing active directory security groups. Group import is under Groups and Users. From there, click the Import button under the Google Apps column.
Do not manually Add groups in the CMC for your Google domain users
To import a group you will need to go into the ClassLink Management Console (CMC) -> Groups & Users -> Group Import
You would click the green import button on the Azure Apps column.
Green Import Button = Domain Enabled!
Grey Import Button = Domain **Not** Enabled!
If this is your first time importing groups, first import an administrator group. Make sure to use the Tenant Administrator profile. Logout then login to your Google admin account. If all is well, import the remaining groups. Remember to select the appropriate profile for the groups you plan to import.
Select a profile, specify the wallpaper and theme color then click next.