Exchange 2013 Auto-Mapping and msExchDelegateListLink

I'm curious how you can tell if the automapping has in fact been disabled after running the following powershell command to disable:

Add-MailboxPermission -Identity JeroenC -User 'Mark Steele' -AccessRight FullAccess -InheritanceType All -Automapping $false

Now, of course I can simply check Outlook, but how can I check using powershell or ADUC or ADSI to see if the automapping $false property has been set?

I have come across articles on Exchange 2010 that mention to check msExchDelegateListLink but it appears 2013 doesn't use this anymore as none of my shared accounts have anything listed in this property.  So what is the new property that controls this?