If the symbolic link created is not visible as a folder then the user starting the Virtual DataPort server might not have the correct permissions for the target location.
Hence, checking the user permissions for the target location will make the symbolic link to be visible as a folder.
Secondly, the created map drive was not visible, might be due to the limitations of the Windows Services regarding Drive letters and the symbolic link alternative should be used. This is because assigning a letter to a network drive is not recommended when starting the Virtual DataPort server as a Windows service.
For more information regarding limitations of Windows Services and Drives, take a look at the Article: [Services and Redirected Drives](https://docs.microsoft.com/en-us/windows/win32/services/services-and-redirected-drives?redirectedfrom=MSDN).
For detailed solution regarding these issues, take a look at the [Troubleshooting](https://community.denodo.com/kb/en/view/document/Accessing%20network%20drives%20from%20Denodo%20Virtual%20DataPort#h.kuhvrkrziunz) section of the Knowledge Base Article **Accessing network drives from Denodo Virtual DataPort**.
Hope this helps!