web server using windows authentication, how can it use one user's right to access another file server?

There are two servers, WebServer, FileServer,

client1 can access the WebServer, using integrated Windows authentication,
client1 has access FileServer permission, but the network can not directly access FileServer.

Whether through the WebServer, according to client1 permissions to access FileServer?

In other words, WebServer able to simulate the identity of client1 access FileServer?
 
 
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