NEIL Harris insisted Millwall and Jordan Archer "depart on really good terms" – and backed the goalkeeper to be a success in his future career.
Archer, 26, will leave the Lions when his contract expires at the end of June.
Harris said the Scotland international "had some wonderful times" at the club, after joining from Tottenham Hotspur on a free transfer in the summer of 2015 following a loan spell at The Den.
Archer made his senior Lions debut in a 2-1 defeat to Barnet in the League Cup, the first of 166 appearances under Harris. His last game for Millwall was a 2-1 loss at Bolton in March last season.
He lost his place to Ben Amos earlier in the campaign, with Harris alluding to a "mentality issue". David Martin finished the season as first-choice goalkeeper, with Amos as back-up and Archer not involved as Millwall fought off relegation.
Archer is currently looking for a new club for the 2019-20 season.
"I think Jordan has had a terrific spell at the club," Harris said. "He came as a young man from Spurs with real little experience and now leaves with a real good knowledge of the game.
"He has certainly grown as a young man and as a personality within the dressing room.
"He has had some wonderful times in a Millwall shirt and played some key moments in big games for us.
"I think we're going through a stage where the cycle of a lot of players is coming to an end and we need a change and a player needs a change as well. Jordan fits into that category.
"He has had a frustrating season, in and out of the team, and maybe now it is an opportunity for him to go and establish himself somewhere else and certainly a change for us in our goalkeeping department.
"I think myself and Jordan have known for a while that this might be his last season. Jordan played some really good games for us and then was a little bit erratic at times.
"On the whole, I look at Jordan's time as really promising, he has done really well for us. He will go on to have a good career.
"As the season has gone on, we have just needed a change of direction. Jordan knows that. He has been absolutely fantastic in and around the place. We depart on really good terms and I wish him all the best for the future in the game."
Image: Millwall FC