Can there be any doubt left? Obama knew, from the beginning, what Fusion GPS was up to regarding the dossier. There is a strong argument that Fusion GPS was one of the contractors with access to the NSA intelligence database, using it for opposition research, until the NSA head shut that access down in April 2016. That shutdown precipitated the frantic search for probable cause to support a warrant. And that means that Obama knew about this since April 2016 at the latest, when the dossier work started, and probably since much earlier -- how long ago was Fusion GPS first set up with access to the NSA database as a contractor?
I'd bet a year's salary that Obama knew when it was set up.