I was able to count how many occurrences of dates between 2 date ranges, however now I having difficulty counting how many times Yes occurs between 2 date ranges.
this formula works for counting how many times a date range occurs where I23 and I24 are the dates in the range (11/30 - 12/15)
=COUNTIFS(non_activated_accounts_100112!J2:K4000, ">="&$I$23,non_activated_accounts_100112!$J$2:$K$4000,"<="&$I$24)
This does a great job of counting how many instances of dates showing between the two dates. however I would like to add an additional check column J:2:4000 for "yes", and get result of how many instances of "yes" are there between the 2 dates.