Edited Unassigned: WORKDAY formula with negative number of days added [15334]

I have a formula to find the date two workdays ago.
=WORKDAY(TODAY(); -2)
For today (2015-08-27) it returns 2015-08-25 in Excel

But when i calculate with EPPLUS it returns 2015-08-27
It returns the same for -1 -2 -3 -4 and for -5 -6 -7 it returns 2015-08-20

I'm using 4.0.3 but i have tried 4.0.4 and found the same problem