IIRC, it was in the IG report that said she was the only SOS to use a private email exclusively, and that if it had been asked, permission would not have been given. That couldn’t have been too hard for them to find if the IG had it figured out.
I guess it was two... Hillary had second secret email address
Not only that but Huma and other aides had email addies on that domain too.
Top Secret Info Handled By Up to 30 Different Accounts On Hillary Clinton’s Server“The official said the accounts include not only Clinton’s but those of top aides – including Cheryl Mills, Huma Abedin, Jake Sullivan and Philippe Reines – as well as State Department Under Secretary for Management Patrick F. Kennedy and others. There is no public evidence they were authorized to receive the intelligence some of which was beyond Top Secret,” Fox News reports.