set quota on multiple users via a list.

Hello.

I am trying to set quota limits on multiple users using a CSV file.

In the excel csv file in first row i have the users@domain.com listed, and thats all.

Then im running the below command but the changes are not taking any affect.

import-CSV "C:\quota.csv" | % {Set-Mailbox -identity $_.alias -IssueWarningQuota 19GB -ProhibitSendQuota 20GB -ProhibitSendReceiveQuota 20GB}