From August 29, 2019
The DOJ Office of the Inspector General (OIG) initiated this investigation, following a referral from the FBI, after the FBI determined that Comey may have shared memos that contained classified information with individuals outside the FBI. At the time, the OIG was aware of Comey’s congressional testimony that, after his removal as FBI Director on May 9, 2017, he had authorized a friend to provide the contents of one of the memos—which did not contain classified information—to a reporter for The New York Times.
https://oig.justice.gov/news/doj-oig-releases-report-investigation-former-fbi-director-james-comeys-disclosure-sensitive