Mourinho insisted that he has a professional relationship with Pogba despite their differences being laid bare in public this week, and confirmed that the France star would play at West Ham on Saturday.
However he made it abundantly clear to United's £89million record signing that the club comes first after stripping him of the vice-captaincy and challenging him over an Instagram post in a televised training ground row.
'Manchester United is bigger than anyone and I have to defend that,' said Mourinho. 'He's a player like the others, and no player is bigger than the club.'
The United manager revealed that he made the decision to take the captaincy duties off Pogba after considering the matter several weeks.
It's understood that Pogba upset Mourinho by confirming that he wants to leave Old Trafford for Barcelona and then antagonised the manager by criticising the team's tactics after the draw against Wolves last weekend.
Pogba was summoned to Carrington after two days off for an 11am meeting on Tuesday morning when he was informed of the decision, and Mourinho told the rest of the squad in a separate meeting two hours later.
He added: 'I explained in detail to the people that had to know in detail, which is the squad and especially Paul. So Paul and the other players in the squad know in detail the reason why myself and my coaching staff decided to do that.
'I always analyse a player as a player. When a player is captain, I analyse the player by the player and captain perspective. After weeks of analysing and changing opinions with my coaching staff, we made the decision Paul is just a player and not a captain. Decision made.
'I informed the player and the players, and when I was asked before the match on Tuesday I confirmed. Now I confirm and now end of the story.
'I can anticipate more questions by saying the relationship between player manager is good – is not anymore a relationship between captain and manager.
'The relationship is good. Nobody trained better than Paul on Tuesday, Wednesday and Thursday. Nobody trained better than him. Some trained as well. Tomorrow he plays, so end of the story.
'It's a good relationship between player and manager, exactly that. I think Paul said that in one of his appearances in the famous mixed zone and is exactly correct.'