I have multiple criteria and the last one is comparing two columns with dates. Here is what I have so far:
=COUNTIFS('eMail Tracker'!A:A,"<>",'eMail Tracker'!K:K,"",'eMail Tracker'!O:O,">" & NOW()-1,'eMail Tracker'!M:M,"<" & 'eMail Tracker'!N:N)
This checks for:
Column A is not blank
Column K...