Comey says Obama knew about HRC's private email address. Comey also knew about Obama's personal email address. Exchange starts on page #74.
Forgot my link
https://oversight.house.gov/wp-content/uploads/2018/12/Comey-Interview-Part-Two.pdf
Forgot my link
https://oversight.house.gov/wp-content/uploads/2018/12/Comey-Interview-Part-Two.pdf