I ran into the following issue with a customer in which the Apprenda Repository was not accessible from Windows Server 2012 to a NetApp NAS.
The workaround to fix it is explained in the following article: http://support.microsoft.com/kb/2686098
The important step is:
Disable secure negotiate on your server with the following powershell command:
Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters" RequireSecureNegotiate -Value 0 -Force