The United boss was sent to the stands during a frustrating draw with West Ham on Sunday and is now facing a second touchline ban in the space of a month.
But, with Mourinho having until Thursday to respond to a Football Association charge of improper conduct, he will be free to take his place in the technical area for a second home clash with the Hammers in four days.
His challenge will be to oversee a much-needed win after the result at the weekend condemned United to their worst league start since 1989-90, with just 20 points from 13 games.
Standing opposite him will be Hammers manager Slaven Bilic, who feels the Portugese may have been harshly treated by referee Jon Moss on Sunday.
Mourinho was dismissed after reacting angrily and kicking a water bottle after midfielder Paul Pogba was booked for diving following a challenge by Mark Noble.
Bilic said: "Why I have sympathy with him is that situation with Pogba looked from our angle, and he was close to me, that it didn't look like a dive.
"It was obvious and it was a great decision from the referee, but from our point it did not look like a dive. The problem is that he hit that bottle like... it was a great volley to be fair. He should have miskicked it! He hit it too good."
Bilic says there is certainly no ill will from him towards Mourinho following the outburst.
Manchester United transfer targets
Manchester United transfer targets
1/6 Jose Gimenez (Atletico Madrid)
The 21-year-old Uruguayan has already played 21 times for his country and has been touted as a future world-class centre-back. Currently on the books of Atletico Madrid, Gimenez is not a regular and a move in January for first-team football would surely appeal to him.
2/6 Victor Lindelof (Benfica)
The most recent player to be linked with the Red Devils, Lindelof is a 22-year-old centre-back currently plying his trade at Benfica. The Swedish international has been in fine form this season and could be tempted by a move to England in January.
3/6 Mesut Özil (Arsenal)
The German midfielder has emerged as a shock transfer target for the Red Devils as the Arsenal playmaker demands a substantial increase to his current £140,000 per week contract in North London.
4/6 Antoine Griezmann (Atletico Madrid)
The French forward had a brilliant season in Spain last year and was top scorer and Player of the Tournament as he helped his country to the final of Euro 2016. Atletico Madrid would certainly not let him go on the cheap however.
5/6 Yannick Carrasco (Atletico Madrid)
The third Atletico Madrid player reported to be on Mourinho’s wish-list, Carrasco is one of Belgium’s new generation of talent and, at just 23 years of age, has a long career ahead of him. The Belgian is an attacking midfielder who has added a ruthlessness in front of goal to his repertoire this season, contributing nine goals in all competitions.
6/6 Bruma (Galatasaray)
Galatasaray’s fleet-footed winger is rated at around £21.5m and has impressed in the Turkish league this season, receiving five Man of the Match awards in just ten starts so far. Bruma is a fantastic dribbler who would certainly provide competition for places on the left wing.
He said: "I like him and I have a good relationship with him, I like him and I don't hide it. I am very proud to have a very good relationship with him."
United dominated Sunday's meeting, having 17 shots to the visitors' six while Hammers goalkeeper Darren Randolph was a clear man of the match.
United midfielder Ander Herrera is taking nothing for granted but is convinced the Red Devils are overdue some luck.
The Spaniard said: "It's very important, every game is. We want to turn the luck in the next game and the next game is League Cup.
"West Ham are a good side, it is not easy to stop them creating chances. They have (Manuel) Lanzini, they have (Diafra) Sakho, they have (Dimitri) Payet, they have (Michail) Antonio - they have very good players, but they just created two chances in the whole game.
"They didn't get the ball for one minute because we were the dominant team so, hopefully, on Wednesday, we can create as many chances as we did (on Sunday) and (then) normally we should win."