quick way to check if a mailbox has delegates - exchange 2007 SP1 - powershell

Sometimes you get those calls where a user is getting strange meeting invites and they just don't know why. Your first guess is that they're on another user's delegate list. So you go through the list of people on the meeting invite and try go figure out who the culprit is. Prior to Exch 2k7 SP1, you had to either track each one down or create a bunch of profiles and search. Now you can do it from powershell.

# script to check delegates for a particular mailbox
$UserToCheck = get-mailbox UserName
#check what users have access:
$result = $UserToCheck.GrantSendOnBehalfTo
#display results
$result