On Wednesday, NBC received at least two more complaints related to Mr. Lauer, according to a person briefed on the network’s handling of the matter. One complaint came from a former employee who said Mr. Lauer had summoned her to his office in 2001, locked the door and sexually assaulted her. She provided her account to The New York Times but declined to let her name be used. She told The Times that she passed out and had to be taken to a nurse. She said that she felt helpless because she didn’t want to lose her job, and that she didn’t report the encounter at the time because she felt ashamed…