He has an option to extend his contract by a further year but has asked to be moved.
According to sources, United have toldRonaldo that he is not for sale this summer and they expect him to stay for the last year of his contract.
A number of clubs are interested in addingRonaldo.
Despite his respect for United and their fans, the former Real Madrid star feels he needs the motivation of playing in the last stage of his career, and that's why he wants to play in the European Championship. It is said thatRonaldo believes that he needs to compete for major trophies in order to be a good player.
During his appointment as United's new head coach last month, he said that he had plans for the upcoming season, and one of them was the presence ofRonaldo.
The first time he joined United was in 2003 when he was a member of the team from Portugal.
After scoring 118 goals in 292 games, he left for Real Madrid, where he spent the next eight years.
In his three seasons with the Bianconeri, he didn't win the trophy, but he did win it with United and Madrid. He was the top scorer in Italy for the last two years, scoring 101 goals in 134 appearances.
In his career, the former Real Madrid player has won 32 titles.
He was the captain of Portugal when they won the Euro 2016 gold medal.
A five-time Ballon d'Or winner,Ronaldo is the man with the most goals scored in internationals.
He is going to lead Portugal at the World Cup.
Information from a correspondent for the sports network was used.