[OpenIndiana-discuss] Multiple Windows servers and a OI NAS, how to get there

[Open Indiana]

I have multiple Windows 2008 servers that need to write to a shared storage
somewhere in the network. 
One of the servers will gather and process all files on that drive. 

We thought we were good with iSCSI but that doesn't seem to work, because
multiple Windows machines cannot share a NTFS partition. 

I tried to create a networkshare to the networkdrive on every server, but
that gives a lot of problems with the services since they cannot find the
share when the original user has logged off.

Is there anyone who has successfully created a stable NAS solution in OI
that can be used and written by Multiple Windows clients?