For more information on using this script, see the article Adminstratively Managing User Contact Lists by Nick Smith.
#Contributed by Nick Smith, Microsoft
#Supported Versions: Office Communications Server 2007 R2
#Get User Information
$User = Get-WmiObject -Query "Select * from MSFT_SIPESUserSetting where PrimaryURI = 'sip: user@domain.com '"
#Get the contact on the user's contact list
$Contact = ( Get-WmiObject -Query "Select * from MSFT_SIPESUserContactData where UserInstanceID = '$UserInstanceID'" | Where { $_ .SIPURI -like "sip: userToDelete@domain.com " })
#Delete the contact
$Contact .Delete()
