, UEFA have confirmed.
The Inter coach was furious at Luis Medina Cantalejo's performance and accused him of favouring United and a UEFA spokesman earlier today said: 'We are looking into Mr Mourinho's after-match statements.'
However, UEFA have since released a statement, which said: 'There will be no action taken.'
Angry: Jose Mourinho was unhappy with referee Luis Medina Cantalejo
It means Mourinho will not have a touchline ban for the second leg at Old Trafford on March 11.
Mourinho said after the game in Milan: "When we go there [to Old Trafford] we will not have the same referee.
"If we have another referee it gives so much protection to the away team, then it will be us who go to the quarter-finals.
"Everything was against us, every little detail. You watch how many free-kicks they had and we had. The way we got yellow cards and they did not. I think the tendency was clear.
"Hopefully in the next game the referee will be on our side."
UEFA disciplinary regulations demand that a suspended coach cannot visit the dressing-room area upon arriving at the stadium until the game is over.
Stalemate: Adriano and Rio Ferdinand
Four years ago UEFA branded Mourinho, then Chelsea manager 'an enemy of football' after he falsely accused Barcelona coach Frank Rijkaard of visiting the dressing room of referee Anders Frisk at half-time during a Champions League tie at the Nou Camp.
Mourinho was handed a two-game touchline ban but in the wake of his comments Frisk retired from refereeing after receiving death threats.
However, it was alleged that to get round the touchline ban during a tie against Bayern Munich at Stamford Bridge, Mourinho communicated with his coaching staff via and earpiece and was smuggled in and out of the dressing-room at half-time in a laundry skip.
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