A sleeve with the cable leaving both ends exposed is understandable.
A sleeve of raceway that terminates into a box, cabinet, conduit body, etc. -- does it need to have some kind of raceway to cable adapter, or can the cable just be run into the raceway? If so where can the end of the sheath be?
I have always used a coulpling and MC connector to make an adapter when doing this and stripped all of sheath off of conductors beyond that point.