Check box sets
I have multiple category values per contact in a check box on the contact record.
I want to import a set of categories for a number of the contacts that already have checked values for other categories.
When I import the new set it wipes out the other checked categories for a found contact.
For example: I have 10000 contacts. Categories include among many others, "Student", "Eventattendee", Donor.
I want to add (check off) 500 "Donors" to the relevant Contacts records, some of which are already checked off as "Student"s and/or "Eventattendee".
How do I import those 500 donors without eliminating the other categories already checked for the same contacts?
I'm not particularly keen on checking each one by hand.