In a Web farm environment, all Web servers access files on the one Web server that hosts the file storage. The security implications of cross-machine resource requests can be complicated. You can configure security parameters for your application in a number of ways and each operating system uses a different account to run the ASP.NET process.
For reference, review the matrix in the Building Secure ASP.NET Applications article in Microsoft's TechNet Library to understand the various security contexts in which your resource request will leave a Web server. Because many of these options are environment specific, also read about the various configuration that allows for delegation in Telligent Evolution or any ASP.NET application. Understanding how the underlying ASP.NET security model works is critical to understanding how you must configure remote network file requests from within Telligent Evolution.
Telligent Enterprise uses a centralized file storage (CFS) provider to allow for the configuration of any number of external file storage systems (for example, Amazon S3, UNC path, etc.).
If you are making the switch from a local file share to a remote file share, then you will need to move all of the folders and files to the remote location. Be sure to review the permissions on the files once they are moved to ensure they are still accessible by Telligent Enterprise. For each Web server that you need to change, we recommend using an override file to modify the path.