Is the backstory of Ilsa Faust's mission explained by the writers and producers of Mission Impossible Rogue Nation?
The mystery of her assignment is at the center of the movie's evolving plot, but is never overtly explained in the movie itself.
Specifically, Ilsa is sent undercover to expose Solomon Lane and the Syndicate. She seems to report to Chief Atley, but we find out that Chief Atley initiated the project to create the Syndicate, which Lane then took control of. When she brings a disk containing the information needed to access the Syndicate's potential funding to Chief Atley, he secretly deletes it and gives it back to her, tricking her into bringing an erased disk to Lane and thus putting her at risk of being killed.
We are told that Lane betrayed Atley by removing the Syndicate from British government control, but Atley seems to have no interest in supporting Faust's mission - instead, he tries to sabotage her mission. So it seems that Faust may have been assigned to infiltrate the Syndicate by someone else whom we do not meet, and that her mission may have been defined with some motive which is not revealed, but that is at odds with Chief Atley's interests (Since Atley doesn't seem to actually be trying to undermine the Syndicate, but only to conceal its existence).
So who assigned Ilsa Faust to her mission? And why?