Zaha, who will sign on-loan for Cardiff City, has frequently been at odds with Moyes since arriving from Crystal Palace for an initial £10million. He even found himself on the bench for the reserves recently after turning up late.
Freedman worked with the winger at Crystal Palace and said: "It’s funny how things have worked out with the timing of his move.
"I have always been a huge admirer of Wilfried but have never been on the opposite side to him before. It will have been frustrating for him at United so far because all he has ever known in his career from 16 has been first-team football. All he really understands is playing on Saturday, recovering and being ready for the next game.
"So leaving London to join a huge club like United and finding opportunities scarce will not have been easy for him. It will have been a big test for him, but he is a strong character, and I am certain he will come through it.
"I’m still convinced it was the right move. When a club like United come knocking you can’t turn them down. It’s just that they’ve had a difficult time, and I imagine David Moyes feels it would not be ideal to throw two youngsters in, with another (Adnan Januzaj) on the other wing.
"But there is no doubt he will be a success at United. A lot of young players there will have worked their way up the ranks and had to be patient, but Wilf has never had to face that.
"It’s something he is now learning, and that’s no bad thing. Even Cristiano Ronaldo needed time to adapt.
"He will go to Cardiff now, spend a few months playing Premier League football and then go back and prove he should be in United’s team next season. I’m sure of that."
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