The Red Devils boss is said to have been granted a meeting with the club's hierarchy prior to jetting off to the United States, where his side have so far drawn both of their pre-season friendlies.
Even before being held by Club America and San Jose Earthquakes, Mourinho was aware that a further cash injection would be required if United are to seriously challenge for silverware this coming season.
According to The Sun, the former Real Madrid and Chelsea manager is particularly concerned about his current defensive and midfield options.
A source is quoted by the publication as saying: "There was a meeting at Carrington before the squad flew out for their pre-season tour. It was between Jose and the money men.
"The Glazers will also have their say on everything. There has been a few updates on negotiations and a few new names have been thrown into the ring."