Hi Experts,
I need a formula to arrive at number days that an employee has worked in a given month. There may be three or four customer visits he would have done on a single day, but the count for days has to be taken as 1 only like his attendance. Ex: if there are 3 entries of 02/01/2021 for Engineer A then the count of date should be 1 only for that month.
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The engineer column and arrive date columnsNSP DUMP-Y1 2020.xlsx are highlighted in the attached file, please support with a formula to arrive each engineer worked days in that month.

Thanks in Advance

Raj