Although I do not clearly understand where the problem is, would be better also to see an Excel sample file, however, here is a link to a complete guide to Date Math Functions, including the Workday.Intl function
This tutorial is a Festival of Date Formulas & Functions! With over 40 examples that will allow you to hold a firm grasp of Date Math. I also included on a separate sheet a full definition of each function with the arguments required to use them. You can Download the Exercise file and Follow along
Minus one day at the end of the formula looks incorrect. For example, for ID=7 WORKDAY.INT goes on 02 March. Minus one day is 01 March, but that's Friday, thus one more day shall be deducted.
IMHO, more correct will be to use LeaveDays-1 within the formula - to the first day of leave you add total days of leaves minus 1.
For the next record, ID=1011, LeaveStartDate is 05 June, but that day is holiday. Usually LeaveStartDate is considered as first workday on leave period. If that's not your case, when you shall check if LeaveStartDate is holiday or weekend, and deduct one day depends on that.
Thanking you very much and I understand the incorrect formula. So I have to provide one more conditions like if leave start date is holiday should add one day additional. And also if leaves end with holiday need to deduct one more day.