The first date the SalesReport covers

slsrpt_Examples
 <salesReport dateFrom="2018-03-17" dateTo="2018-03-20"> 
slsrpt_XPATH
/b24Message/salesReport/@dateFrom
slsrpt_Required
Yes
slsrpt_Type
Number
slsrpt_Limits

None

slsrpt_Sort
1000
Id
1