How To Enable Google Drive for Your Domain
This action is performed by a domain administrator in the Google Apps control panel to enable Google Drive for users:
1. The domain administrator needs to make sure that the right options in the domain settings are selected in order to enable Google Drive:
In order to get fast access to Google Drive for the domain, select Rapid Release and Automatic new services.
2. To allow users to install Google Drive on their computers, go to: Service Settings > Docs and Drive, and check “Allow users to install Google Drive for Mac/PC.” To allow users to download Google Drive Apps, check that option as well.