Exporting AD Users to CSV, editing/updating, then importing back into AD

Hi guys,

I am very new to Powershell and need some help. I would like to export all users to a CSV, file ( with only the details name, department, description, title, company,and office ) update the details I want to for each user, save the CSV file, then upload it back into AD to overwrite/update the users.

I can export what I want just fine into a CSV with:

get-aduser -filter * -properties department,description,title,company,office | Select-Object name,department,description,title,company,office | Export-CSV C:\adusers.csv

Then I can go in and update each attribute, but am having problems uploading back into AD

Any help would be appreciated

Thanks

Kieran