Currently, each user must go into their 'My Account' section and update their communication settings for each group to disable emails from coming through. The Member Digest Email contains information that many employees would not want, and many clients would like to limit the unnecessary emails their employees receive. Allowing this email to be disabled for all users by the client, or setting the default to 'Never', would ensure that users that do not often access the site or know how to adjust their communications would not receive this email if the client did not want them to.