Overview

This article describes the error and its resolution when clients like the File Archive Assistant or the Archive Assistant fail to connect to the server with a generic error. For example, the File Archive Assistant would display:
An error occurred while communicating with the GFI Archiver server.

The following event is logged in the Windows Application Event Log on the server when such a client attempts to connect:

Event ID: 3
Source: System.ServiceModel 4.0.0.0
Level: Error
Details:
WebHost failed to process a request.
Sender Information: System.ServiceModel.ServiceHostingEnvironment+HostingManager/62476613
Exception: System.ServiceModel.ServiceActivationException: The service '/Archiver_Services/FileArchiveAssistant.svc' cannot be activated due to an exception during compilation.  The exception message is: The extended protection settings configured on IIS do not match the settings configured on the transport.  The ExtendedProtectionPolicy.PolicyEnforcement values do not match.  IIS has a value of WhenSupported while the WCF Transport has a value of Never.
...
Process Name: w3wp
...

Environment

GFI Archiver using clients such as the File Archive Assistant or the Archive Assistant

Root Cause

Internet Information Services (IIS) are configured in an incompatible way.

Resolution

1. Open the Internet Information Services (IIS) Manager.
2. Expand: <server> > Sites > <the site in which GFI Archiver is installed>
3. Select Archiver_Services.
4. Open Authentication.
5. Select Windows Authentication.
6. Select Advanced Settings... (on the right-hand side)
7. Set Extended Protection to Off.
8. Save the settings.
9. Run the command: iisreset /noforce