Export email addresses, username and displayname from AD group to text file

Sometimes I get asked to export certain properties from AD or Exchange because I tend to do things with Powershell for ease of use.

Same goes for this request, retrieve the members from an AD group and display the username, displayname and emailaddress and export it to a file:

$groupname = "AD group name"

 Get-ADGroupmember $groupname | %{get-aduser $_.samaccountname -properties cn,samaccountname,emailaddress | select cn,samaccountname,emailaddress | Out-File c:\temp\output.txt