I'd strongly recommend using a Pivot Table instead...

http://peltiertech.com/Excel/Pivots/pivotstart.htm

In article ,
Ann wrote:

I need a total (count) broken down by user (name) and month. What formula can
I use to achieve this? SUMIF only allows 1 criterion, whereas I have two
(name and month).

A2 = Count
B2 = Name
C2 = Month

EXPECTED RESULTS:
Jan Feb Mar
Smith 20 4 15
Jones 16 12 19