Update FAX number in O365

# Import the CSV file

$csvPath = "C:\Users\naufil.mirsinge\Downloads\fax.csv"

$users = Import-Csv -Path $csvPath

# Update fax number for each user from the CSV

foreach ($user in $users) {

    Set-User -Identity $user.UserPrincipalName -Fax $user.FaxNumber

}