Sky Sports News HQ has been told that Mourinho is conscious of the need to continue United's legacy of bringing through young players into the first team, and even passed on the opportunity to sign Leicester's Jamie Vardy this week so as to protect Rashford's progress.
Sky sources first reported United's interest in the former Malmo FF, Ajax, Juventus, Inter Milan, Barcelona and AC Milan star back in May, ahead of Mourinho's appointment to replace Louis van Gaal.
Talks between United and Ibrahimovic's agent Mino Raiola gathered pace following Mourinho's arrival at Old Trafford, and Sky sources subsequently reported last week that they were only Premier League club Ibrahimovic was considering.
It is understood the 6ft 5in, Malmo-born Swede wants to add the Premier League to his array of titles that includes the Spanish La Liga, Italian Serie A, French Ligue 1 and Dutch Eredivisie.
Ibrahimovic had more lucrative offers from Chinese Super League clubs and options in Italy, but it appears he has been convinced to move to Manchester for a reunion with Mourinho, and that it's the right move to make at this stage of his illustrious career.