This article was updated on the 4th October 2015 and is valid for version 5 and up of AD Bulk Users.
To update most attributes with AD Bulk Users you simply add the sAMAccountName (username of the user to be updated) followed by a Modify column with the value set to TRUE (as we are updating a user not creating a new one) followed by the attributes that you want to update.
To update a users name that you see in Active Directory Users and Computers you need to update the ‘cn’ attribute.
The example below would update the cn and userPrincipalName.
jsmith,TRUE,John Smith,John Smith
You can use wildcards such as %username% in the Rename column if needed for example in the userPrincipalName value you can use %firstname.lastname@example.org which will read the value from the sAMAccountName column.
Note: Column headers can be in any order and are not case sensitive.
I hope this helps, if you have any further questions please just ask.