I recently started using windows 8.1 in my office. Setup a brand new laptop with windows 8.1 and installed all apps, joined to domain.
Everything was looking great until I tried logging in to the computer as a domain user. Every user gets a mapped drive from my Windows 2008 DC which uses a Netapp filer. In this case, I could see mapped drive, and open that to see all sub folders, but when i tried accessing the folder, got an error “an unexpected error occurred”.
To double check, I accessed the Netapp filer directly, but then started getting “permission denied” error.
With Windows server 2012 and Windows 8, Secure dialect negotiation is introduced in SMB 3.0. This feature depends upon the correct signing of error responses by all SMBv2 servers, including servers that support only protocol versions 2.0 and 2.1. Some third-party file servers do not return a signed error response. Therefore, the connection fails
After hours of searching and testing, finally found the solution.
To fix this issue, open up command prompt as administrator and run the below powershell command:
powershell.exe Set-SmbClientConfiguration -RequireSecuritySignature $true
Reboot the computer and I could browse and access all files/folders without issues.