A Memphis megachurch pastor whose congregation applauded him in January after he admitted that he had engaged in a “sexual incident” with a high school student in 1998 resigned from the church this week.

The decision by the pastor, Andy Savage, 42, came on the same day that Highpoint Church said it had completed a two-month investigation into his past and found no other cases of suspected abuse. But church leaders also said that while Mr. Savage had disclosed the episode with the woman, Jules Woodson, when he was hired in 2002, they had not been told the full story.

“Before employing Andy Savage, the church leadership was informed of his past with Jules Woodson, and we understood that it had been thoroughly addressed at the time,” the church said in a statement. “We have since learned that this was not the case.”

On the heels of the #MeToo movement, Ms. Woodson came forward with her story in a blog post in January about when she said she was 17 and Mr. Savage was a youth pastor at a church outside Houston. One night in 1998, she wrote, Mr. Savage offered to drive her home from the church but first took her to a wooded area off a dirt road and had her perform oral sex on him.