@itworkedinthelab,
Only users who has owner permissions will be able to delete the folder, other users wont and eventually why would user delete the folder unnecessarily unless it is not required :) and moreover we always have the dumpster settings in place where the folder
can always be recovered using the Shell or the owner can use the outlook to perform recovery.
if the folder is not present in the Hierarchy and if it needs to be restored, it has to be created and you can refer to the recovery method discussed in the blog.
also at this point of time we do not have auditing for the PF mailboxes. Please see #
http://technet.microsoft.com/en-us/library/jj552408(v=exchg.150).aspx
technet.microsoft.com/.../jj552408(v=exchg.150).aspx