Bulk User Change via csv Import

Bulk User Change via csv Import

Hello,
Im testing the bulk users change method using the bulk csv import option.
Ive tried several different methods & fields but I cant seem to get the ad full name field to update.
As per pic attached the name has changed in the Last Name field & the display name field but it doesnt want to change the full name bit for some reason.
Ive tried using the cn, canonical name & distinghuished name fields & they dont seem to help.
Can someone please advise if I need to add another field to my csv file with the full name or if Ive done something wrong some where?
Obviously this is not something we would normally do as bulk name changes would be rare but Im just wanting to use the bulk import option to change any details I can etc.





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