CSV is a text file. The issue is not with EXCEL but your Yahoo export
and Century 21 import. Excel doesn't even need to be used. You could
edit it in Notepad if you wished.

Top agent needs importing csv help wrote:

I need to import my contacts from my Yahoo account to my Century21 online
contact list and it requires a csv formated file to import. I downloaded my
yahoo contacts to a CSV format but when I save the file I get an error
messege stating:
may contain features that are not compatible with csv do I want to keep this
file. When I try and import the file to my C21 contact list it does not
recognize the headers. Anyone know what I have to do to make this work? I
have anohter database to upload with the same issue