Google+, the search giant's new social network, is now open to businesses, universities and schools. Up to this point, the social website was applicable to personal accounts only.
In order for Google+ to work with your account, your web apps administrator will need to approve and enable the application from their account management dashboard. Some administrators may not readily allow for access to the social site because corporate policy may restrict employees for engaging with others in the public sphere from an official email. The reasons for this may be as varied as information security and leakage concerns to a broad concern for what employees may say or do while using their official emails in a social network environment.
