Cannot read synced folders - network error

[Enda Kenny]

Hi Folks

Im having issues with synced folders in vagrant. I have a windows 7 host, using virtual box i have a server 2012 guest. The shares mount and i can navigate to to the directory on the guest but when i do a 'dir' i get an network error. I can browse to the directory on the guest. Any ideas?

[localhost]: PS C:\Users\Administrator\Documents> dir .\guest_share

dir : The network path was not found.
+ CategoryInfo          : ReadError: (C:\Users\Admini...nts\guest_share:String) [Get-ChildItem], IOException
+ FullyQualifiedErrorId : DirIOError,Microsoft.PowerShell.Commands.GetChildItemCommand

Creating a file fails with an identical error. 

I have enabled CredSSP on host and guest. 

I get identical behavior with default syned folder as i get with my custom one.

Here is the excerpt from my vagrantfile: 

config.vm.synced_folder "share/", "C:/Users/Administrator/Documents/guest_share"

Any help would be greatly appreciated

Enda