Currently a Blackbaud written refresh of Admin View Only(AVO) fields requires every AVO field to be included in the csv file (as 2 columns - name and value). Please rewrite this process so only the user identifying information and AVO fields that need updating are required in the csv file. It's quite a bit of extra work to include all the AVO fields, most of which are irrelevant to what needs updating at any given time.
This is HUGE! Best things since sliced bread. Thank you, Janet.
Great news! This is now available through the Core > System Tools > Data Import under the category type of 'User Update'. You can upload just the users and admin custom fields you need.