Mr. Lemon, one of the network’s most recognizable stars, had been under scrutiny since making remarks about women and aging in February that were widely perceived to be sexist.
CNN’s chairman, Chris Licht, said in a Monday night memo that the anchor “has agreed to participate in formal training” after making on-air comments widely regarded as sexist.
Mr. Lemon’s assertion that the presidential candidate Nikki Haley was not “in her prime” roiled the network and put a harsh spotlight on its struggling morning show.