Ralf Rangnick will not be taking up the consultancy role that Manchester United had planned for him, it was revealed on Sunday.
After a disappointing spell as interim manager, the prospect of Rangnick remaining part of United's plans had appeared to fade.
He was appointed Austria's new coach last month, and that only heightened the likelihood he would move on.
Now United have confirmed Rangnick, who was considered an outstanding strategist when he joined the club, would not be part of their plans in the future.
It means Erik ten Hag, the manager brought in from Ajax on a three-year deal, will not be working with the man he has succeeded.
United, announcing the clean break, said: "We would like to thank Ralf Rangnick for his efforts as interim manager over the past six months.
"By mutual agreement, Ralf will now focus solely on his new role as manager of the Austria national team and will not therefore be taking up a consultancy role at Old Trafford.
"We would like to wish Ralf the best of luck in this next chapter of his career."
Rangnick stepped in as interim boss when Ole Gunnar Solskjaer was sacked back in November, with the initial intention being he would move into an advisory role at the end of the season.
United's often dismal performances and squad harmony came under intense scrutiny under Rangnick.
They trailed in a jarring 35 points behind champions Manchester City in the 2021-22 campaign, finishing in a disappointing sixth place.
Rangnick suggested he could balance working for both United and Austria, but that plan has now been knocked on the head.
United have failed to win a trophy since 2017, while they last won the Premier League title in Alex Ferguson's last season in charge in the 2012-13 campaign.