"You know, we have been together for nearly 10 months or something like that", the United boss said ahead of Thursday's Europa League quarter-final second leg with Anderlecht.
Frenchman Martial has struggled in his second season at Old Trafford, scoring seven goals but frequently being left out of match-day squads.
"I go in the direction of the players, they have to also come in my direction", said the Portuguese.
Marcus Rashford extra-time goal eased an edgy United to a 3-2 aggregate win that eased Mourinho's side into the last four of a competition that may offer them their best chance to qualify for next season's Champions League.
Rashford has made 26 Premier League appearances under Mourinho this season, though 12 of them have come from the substitutes' bench.
Ibrahimovic, 35, has been a sensation since joining on a free transfer from Paris Saint-Germain past year, scoring 28 goals and inspiring United to victory in the League Cup.
"He's about that. It's about getting to know each other better and better and better and going in the direction of things we like".
The "Lion", as he might prefer to call himself, is turning 36 soon, and I cannot bet against him being fit enough to play for five more years - but I can bet against him being as productive as he is at the moment.
"I think for Zlatan it would be fantastic to play the final in his country, it would be flawless, it would be attractive - no more than that".
On the game with Anderlecht, he added: "I would say that, as United, in my opinion, from the first game of the Europa League, it's been a very important cup".
"He's not my goalkeeper for the Europa League, he's my goalkeeper for tomorrow", the manager told reporters.
Last week, after Manchester United played Anderlecht to a 1-1 draw in Belgium, Red Devils Manager Jose Mourinho totally ripped his quartet of attacking players.
Relegated to the bench against Chelsea, top-scorer Zlatan Ibrahimovic, Michael Carrick and Henrikh Mkhitaryan are all expected to return to United's starting XI against Anderlecht. His experience, his know-how of this knockout phase, I think he is a player who can be useful (tonight). We believe that as a result of this alignment will lead to a fairly open confrontation, where the case has two goals will not be limited.
Since Mourinho last competed in the Europa League (2003) he has won two Champions League titles.
"We know we are playing a very high level team in Manchester United. Wayne is the only one that is possible, but I can not confirm now", Mourinho said.
"David's priority to play Premier League but I don't like the complete separation".