Cannot write to network share from Windows VM (quota exceeded)

I am running OS X Server (2.2.2) on Mountain Lion (10.8.5) on a Mac Pro. I am running a Windows 7 VM on the machine under VMWare Fusion.

I have been able to connect to the network shares on the OS X server from the virtual machine. I can see the file system and I can read files. However, when I try to write a file to the network share I receive an error that says 'The requested file operation failed because the quota was exceeded.'

I have not placed any quotas on any of the user accounts, and the disk has about 800GB free. I don't know if this is something that anyone has come across - I didn't find much information searching on the Internet, so I thought perhaps someone here might have some ideas of how I might resolve this issue.

Thanks!