if your organization allows to use third party package means
Install Balareva.Excel.Activities
after that in the activities panel search for change cell type activity
if you want to convert whole column like A means you should declare like this “A:A” in cell Tab
copy the destination cell format in excel
follow these steps to find cell format Right click the destination formatted column → Format cells → custom ->copy the value from the type tab
paste the copied format into cell format tab in change cell type activity
finally choose excel file path in change cell type activity
thats it
hope its solves your issue
Thanks,
Robin