Now this is something i find VERY strange.
I have a Server 2008R2 with the Hyper-V role.
This act as the host for a virtual SBS2011.
I have 2 external storage devices installed.
The first storage is a NAS connected with ISCSI.
If I shut down my virtual SBS2011 I am able to export this to drive H which is an ISCSI share on NAS 1.
The second storage is located on another physical Server2008R2 and connected as a plain share (\\SERVER2\STORAGE)
I can confirm, that I have full access to this share but if I try to do an export to this path it fails instantly!!
Can anyone tell me the reason why this is happening?