He knew about it all along-Had his own code name
Hat tip IPatriot
Not only has Hillary Clinton told one lie after another about her email server (and everything else under the sun), President Obama also lied to us when he said he had not been aware of it until the news broke. Nobody believed it then, and now we know he was lying. He had his own alias when communicating with Hillary when she was secretary of state.
So much for the most transparent administration in history.