I have an IIS project which is stored on a Samba shared, network mounted with the following line: X: \\my-samba-server\dev /user:freddie Connectivity is fine, can read/write files from X:. In IIS, I'm trying to set it as the Physical path via \\my-samba-server\dev\folder\to\my\files, which results in the following 500.19 error: Config Error | Cannot read configuration file due to insufficient permissions It is by default trying to use the Pass-through authentication. If I try to set this to connect as the specific user freddie, I receive: The specified user does not exist What is the correct way to connect to a path which has been setup as described above? *Samba man pages indicate version 3.6 is on the Debian host