“The Department of Justice (Department) Office of the Inspector General (OIG) undertook this review of various actions by the Federal Bureau of Investigation (FBI) and Department in connection with the investigation into the use of a private email server by former Secretary of State Hillary Clinton.
https://digitalcommons.unl.edu/usjusticematls/35/
“Clinton served as Secretary of State from January 21, 2009, until February 1, 2013, and during that time used private email servers hosting the @clintonemail.com domain to conduct official Department of State (State Department) business.
“In 2014, in response to a request from the State Department to Clinton for “copies of any Federal records in [her] possession, such as emails sent or received on a personal email account while serving as Secretary of State,” Clinton produced to the State Department 30,490 emails from her private server that her attorneys determined were work-related.
“Clinton and her attorneys did not produce to the State Department approximately 31,830 emails because, they stated, they were personal in nature, and these emails subsequently were deleted from the laptop computers that the attorneys used to review them.
“In 2015, at the State Department’s request, the Office of the Inspector General of the Intelligence Community (IC IG) reviewed emails from Clinton’s private email server that she had produced to the State Department and identified a potential compromise of classified information.
“The IC IG subsequently referred this information to the FBI. The FBI opened an investigation, known as “Midyear Exam” (MYE or Midyear), into the storage and transmission of classified information on Clinton’s unclassified private servers in July 2015.”
https://www.justice.gov/file/1071991/download