Molde owners Kjell Inge Rokke and Bjorn Rune Gjelsten gave the green light to their manager being drafted in by the Red Devils in December following the departure of Jose Mourinho.
The Foxes will rest their hopes of getting something from this game onto veteran striker Jamie Vardy.
Nearly a ideal 10 for Ole Gunnar Solsjkaer.
But if Solskjaer wins the Champions League - United face Paris Saint-Germain in the last 16 later this month - or even just delivers a top four finish to qualify for that competition again next term, then his bid for the job will surely be unstoppable.
He was been linked with moves to Paris Saint-Germain and Juventus but has been convinced that his future lies at Old Trafford.
"He has the capability [to score 20 per season] but I'd like him to make a few more runs in behind because he doesn't miss chances", Solskjaer... Marked a landmark appearance with a clinical strike.
"I am always in the position to tell United who they should look at, and that will continue after the summer if I'm not still here", he said.
Leicester: Schmeichel; Pereira, Maguire, Evans, Chilwell; Ndidi, Mendy (Iheanacho 84), Maddison (Ghezzal 62); Gray (Okazaki 74), Barnes, Vardy. Subs: Ghezzal 6, Okazaki 6, Iheanacho n/a. Diogo Dalot is an option for Solskjaer but I think the Man Utd boss will stick with the experience of Young. Leicester have secured just 14 of 33 points at home while registering a +1-goal difference.
Jonny Evans could have done better with a header at the back post, while Harvey Barnes was not too far away with a right-footed curler from 30 yards out. It deflects into the area for Vardy who sees his powerful acrobatic effort superbly saved by De Gea. Barnes powers down the left.
Rashford blasted wide before Leicester won a risky free kick 25 yards out, Matic fouling Vardy and De Gea making a fine stop from the striker's acrobatic effort after Maddison's shot deflected off the wall. He has netted nine PL goals this season - his best scoring season in the top-flight.
Martial scored 17 goals in his first season with United, but has not matched that total since.