In a bizarro kind of way I guess it was good that he had assassination insurance in the person of Uncle Joe Biden. Any foreign government hacking into Sidney’s server could have planned a hit at any moment of any day.
If a president’s daily schedule isn’t classified - then I don’t know what is!
Speaking of Biden, I don’t think I have seen anything about him in any of these leaks.
And to be investigated without consequences speaks to a more serious problem (assuming the document was subject to investigation.)