Ole Gunnar Solskjaer defended Joel Glazer in an exchange with Manchester United supporters outside their Carrington training complex.
Solskjaer was confronted by supporters who reminded him he voiced his opposition against the Glazer takeover in February 2005, three months before the American family bought United.
Joel Glazer championed the Super League in its introductory statement on Sunday night before he was forced into issuing a grovelling apology in an open letter to United fans on Wednesday evening.
Sources confirmed Solskjaer said Glazer - who has not attended a United match in more than two years - 'loves' the club.
First-team coaches Michael Carrick and Darren Fletcher, as well as early playing arrival Nemanja Matic, exchanged views with the militant fans.
Carrick said in his 2018 book 'the Glazers have been great owners. Couldn't really ask for anything more. The Glazers need a lot of credit for how they've gone about it... United have progressed under the Glazers on and off the field'.
United players usually arrive from 10am for training, so almost all of the players were not present when the supporters arrived at 9am.
Police were called and kept their distance from the supporters, who left on good terms with Solskjaer. The United manager laughed at a quip about a first-team player's attacking shortcomings.
United said in a statement: "At approximately 9am this morning a group gained access to the club training ground.
"The manager and others spoke to them. Buildings were secure and the group has now left the site."
Solskjaer was recovering from a knee injury that plagued him in the last four years of his career and still contracted to United when he became a patron of the fans' group Shareholders United, declaring he was 'absolutely on the supporters' side' in their opposition to the Glazer family.
