Good morning @Adam Cameron tks you reply,
On the main server, NFS was configured as a disk drive, D:/shares
On the secondary servers, a network mapping was created pointing to the main server, //<ip>/shares and they created a mapping in windows for this address.
The first difficulty was to make iis display the PDFs that were on this NFS, on the main server it was enough to add the windows user IISUS in the NFS permissions, on the other servers I had to change the user running IIS to be able to access the files.
The problem now is about the upload, on the main server where the NFS is there are no problems.
But in others when I try to upload using the network path or the windows mapping, the cffile returns non-existent directory.
I researched last night about some possibilities, among them it says to upload locally and perform a cfftp to the other server, but that would involve uploading an FTP service which would not be easy.
Is there any way to make the cffile able to upload to the remote server?