So does this mean I am now legally entitled to all corporate documents on computers connected to the internet?
The CFAA does not depend on any expectation of privacy, only authorized usage.
Expectation of privacy defines the bounds of a search. Police searches are not permitted to conduct otherwise illegal activity Just because they are searching.
https://www.law.cornell.edu/uscode/text/18/1030
>(f) This section does not prohibit any lawfully authorized investigative, protective, or intelligence activity of a law enforcement agency of the United States, a State, or a political subdivision of a State, or of an intelligence agency of the United States.
So something can't be illegal for the police to do for the sole reason that it violates the CFAA. If it violates something else, I suppose CFAA charges can be added on, though.