Help with script using csv import

I have a script with about 7500 users. The headers are DisplayName and PhoneNumber in the csv. I need to read the csv and then update the msrtcsip-line Active Directory attribute for each user. Sadly I haven't used ActiveRoles cmdlets hardly at all so it feels a little humbling to not know how to approach this.

I am thinking something like this?

Import-CSV filename.csv

Get-QADUser $ | Foreach-Object{

    $user = $_.DisplayName
    $phone = $_.PhoneNumber
    Set-QADuser -Identity $user $_ -ObjectAttributes @{'msRTCSIP-Line'="tel=$phone"}
}

Can someone help me out please? Need to run this and then customize it a bit.

Does this look right?

Import-Csv data.csv | ForEach-Object -Process

Set-QADuser -Identity "$_.'DisplayName'" $_ -ObjectAttributes @{'msRTCSIP-Line'="$_.'Phone'"}

Message was edited by: Jason Merrill