Key member with date change to real date

Hi All

First of all - sorry if this questions have been answeared before - I could not find the answear when I tryed to search the forum.

I use Excel 2010 with analysis 2.2.2

I have a column filled with dates, but unfortunately excel can't understand the cells as dates. So until now I have made a extra column with this solution:

=DATE(RIGHT(CELL;4);MID(CELL;4;2);LEFT(CELL;2))

so the key member value will go from 07.06.2016 to a datevalue Excel can handle.

But the problem is that when I update my Analysis report I will need to expand the column with the excel formula.

Is it possible to use the functionality in 2.2.2 to solve this in Advance calculation? or do you have a better solution than I use today.

Hope the question make sense