Michael Jackson never recorded a cover version of the 'Strawberry Fields Forever' song.
Also, sound engineers and producers who worked with him never said anything about a 'Strawberry Fields Forever' cover recorded by him.
They also have no knowledge about such a cover (recorded by Michael Jackson) when fans asked them about that during their seminars.
Michael Jackson acted on Bill Bottrell's advice, who advised the singer that they should focus on recording only one Beatles song ('Come Together').
"During the Bad [album] sessions, Michael asked me to drive him home to Westwood one night. During the drive, we played lots of Beatles songs he had compiled on a tape, he was pretty interested in my opinion, and I told him we should pick Come Together" (Bill Bottrell, Gearspace.com, 2009)
The story that Michael Jackson recorded a cover version of 'Strawberry Fields Forever' emanated from an article of the last issue of the Black And White Magazine (French edition).
That article later proved to be a hoax (they also published a fake artwork of the 'Decade' album in the same article).