We're using an Exchange public folder to store contact records for prospects.
Each employee can contribute contacts to this folder but we want to keep
track of who created them. If a user creates a contact in their personal
contact folder and then drags the contact to the public folder, the "from"
field is properly set to their name.

Somehow, one employee created a large group of contacts in the public folder
that have no "From" field. When we open the contact, this field cannot be
set.

Is there any way to fix these or will they all have to be re-created?