The Enterprise Vault Event Viewer log will show the following:
Source: Enterprise Vault
Event ID: 41520
Task Category: Enterprise Vault Search
Level: Error
Computer: EV-EXCH
Description:
Unable to contact the Search API.
Reason: The message could not be dispatched because the service at the endpoint address 'net.tcp://localhost/EnterpriseVaultAPI/Search/SOAPSearch.svc' is unavailable for the protocol of the address.
V-437-41520
The Windows Application log will show the following:
Source: ASP.NET 4.0.30319.0
Event ID: 1325
Level: Error
Computer: EV-EXCH
Description:
An error occurred while trying to start an app domain protocol listener channel.
Exception: System.IO.FileLoadException
Message: Could not load file or assembly 'System.Web, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. Access is denied.
This issue can be caused by incorrect permissions on the Enteprise Vault installation directory.
Verify the Enterprise Vault folder (Default location: C:\Program File (x86)\Enterprise Vault) has Users added with the following Allow permissions:
Read & execute
List folder contents
Read
From an Administrator CMD prompt run iisreset and close all search windows. Then attempt the search again to verify it now functions without error.