I have 2 disks OS and Data in Server 2008 R2. Both disks encrypted. Both set to auto-unlock.
The OS disk ( C: ) unlocks at boot and I can access it via UNC \\server\c$ without logging on to the server.
I have a share on the non-OS disk ( D: ).
I cannot access the disk by UNC path *UNTIL I LOG IN TO THE SERVER*