Attempting to access the SMB Shares on your local PC using the FQDN fails with a "System error 5 has occurred. Access is denied". But using the short (NetBIOS) name works fine.
Lots of references to this problem when using SharePoint, but very few mention that this also applies to SMB Shares. The fix is to disable Windows default loopback checking.
Under "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa" create a new DWORD value named "DisableLoopbackCheck" and set it to 1. Now the FQDN reference works as expected.
