"Access Control - Do Not Inherit" Grayed out when setting up a backup on Server 2008 R2 when trying to use remote NAS

I see one response here:

http://social.technet.microsoft.com/Forums/en-US/c99eead0-e2fc-4c83-8cb2-959d03512667/server-2008-r2-dc-backup-greys-out-do-not-inherit-option-for-file-share-backup

But it makes no sense to me. Running that command doesn't do anything.

How do I make the box stop graying out when setting up a backup with the GUI interface? This should be really simple I would think and for some reason the backup utility is graying out the "Do Not Inherit" option so I can backup to the NAS device that has access control enabled in order to backup to the NAS.

Thanks in advance!