The story I’ve heard is that Obama told Hillary to concede on the night of the election. This whole thing with Stein’s bizarre challenge to the results in those three states came much later.
I don’t believe he told her to concede. Obama wouldn’t have any say in it and Obama is an activist. I heard that the two campaigns made a deal over who won Wisconsin.
I'm sure that the 'whole thing' was actually in progress way before the night of the election. After all, do you think Stein had to wait until all the votes were in to see that she wasn't going to win (assuming that is the premise for her wanting a recount)?