The Red Devils lined up with three central defenders against Chelsea away from home in the Premier League on Monday night.
They won the game and kept a clean sheet, in a sign of their progress.
And Solskjaer said it is something he may do again.
He said during a pre-match press conference for their Europa League game against Club Brugge on Thursday: "You want a couple of ways of playing. Of course a Man United team never normally plays with a back three.
"We've done well in a few games, yes, and with the players we've got fit it is a very good option in a few games definitely. So, we've got plenty of midfielders that can do that position, running attacking midfielders, we've signed Bruno of course, we've now signed Odion, so it gives us more options.
"Our centre backs are fitter, so yeah."