Pressed by the F.B.I. about her email practices at the State Department, Hillary Clinton told investigators that former Secretary of State Colin L. Powell had advised her to use a personal email account.

The account is included in the notes the Federal Bureau of Investigation handed over to Congress on Tuesday, relaying in detail the three-and-a-half-hour interview with Mrs. Clinton in early July that led to the decision by James B. Comey, the bureau’s director, not to pursue criminal charges against her.

Separately, in a 2009 email exchange that also emerged during the F.B.I. questioning, Mrs. Clinton, who had already decided to use private email, asked Mr. Powell about his email practices when he was the nation’s top diplomat under George W. Bush, according to a person with direct knowledge of Mr. Powell’s appearance in the documents, who would not speak for attribution.

The journalist Joe Conason first reported the conversation between Mrs. Clinton and Mr. Powell in his coming book about Bill Clinton’s postpresidency, “Man of the World: The Further Endeavors of Bill Clinton,” which The New York Times received an advanced copy of.