backing up/copy/robocopy? +100 .unreferenced folders and content

Hi, I have over 100 folders in our Windchill database under a structure similar to the following.

c:\ptc\filevault\companyname\_Folder_1\.unreferenced
c:\ptc\filevault\companyname\_Folder_2\.unreferenced
c:\ptc\filevault\companyname\_Folder_3\.unreferenced

each of these 124 folders contains thousands of files with unique names, w/o extensions with 2.2 million files in total.
need to copy them to a mapped drive;

x:\unreffed

and recreate the files and directory structure beneath the unreffed folder.

I am able to robocopy the directory structure but NOT the contents of the folders when I mapped a drive on another server and attempt to copy from the local drive to the mapped network drive.  I have tried to use wildcards ** to select JUST these folders among the hundreds of others using BackupExec 10 also to no avail --can't get them to select them.  I need to maintain the folder structure so that the .unreferenced folders all aren't thrown on top of each other into a SINGLE folder.  I know explorer has issues with folders starting with a . period...but I thought robocopy would work? Servers are 2003 std (source) and 2008 R2  (destination) Any help appreciated.