The crucial Premier League clash on May 2 was postponed after supporters staging a protest against the Glazer ownership of United broke into the stadium.
It meant the Premier League were forced to reschedule a series of matches and ordered United to play Leicester and Liverpool within 48 hours.
League bosses launched an enquiry amid widespread condemnation at the apparent lack of precautions United had taken.
Lack of stewards and underestimating fan numbers was criticised, and the scale of the operation for the replayed game showed how more thought had been put into ensuring safety.
But having studied the reports and explanations provided by United, Prem bosses have decided that United will not face any action, reports The Sun.
And because no charges are being made it is understood the league have also decided not to make any formal statement over their decision.