Add the email address for multiple security groups from a csv file using powershell

Question

I have a csv file with a list of groups with their email addresses. I need add these email addresses to the mail attribut security group in AD (no exchange). In the csv the first column is labeled group (###.testgroup) second column is labeled mail (###[email protected]).

When I run this script

Import-CSV -path 'C:\Temp\test.csv' | ForEach-Object {Set-ADGroup -Identity $_.group -Replace @{mail="$_.mail"}}

It returns the following instead of the actual email address the mail field.

@{group=###.testgroup; mail=domain.com}.mail