update telephonenumber and Ipphone fields

Hello

I need to update/populate my AD users with the correct telephone numbers 555-123-4567

and then copy that to the ipphone field as 91234567.

I will have an csv with smtp and telephone populated.

I was thinking 2 separate scripts:

Import-Csv C:\testfile.csv | ForEach-Object {
Set-ADUser -Identity $_.emailaddress -Replace @{
telephonenumber=$_.telephonenumber}
}

2.

Get-ADUser -Filter {(SamAccountName -like '*' -and Enabled -eq $True -and TelephoneNumber -like '*')} -SearchBase 'OU=Test_Users,DC=mydomain,DC=local' -Properties telephoneNumber | ForEach {

    $telephoneNumber = $_.telephoneNumber

    if ($telephoneNumber -and $telephoneNumber.Length -ge 4) {
       
        $ipPhone = $telephoneNumber.SubString($telephoneNumber.Length - 7)

        Set-ADUser -Identity $_.SamAccountName -Replace @{ipPhone = $ipPhone}
    }
}

thank you