Error Message

The Application Event Log will also show the following:
Type: Warning 
Event: 1310 
Source: ASP.NET 2.0.50727.0 
Category: Web Event 
Description: 
Event code: 3008 Event message: A configuration error has occurred. Event time: 3/13/2017 7:59:05 AM Event time (UTC): 3/13/2017 12:59:05 PM Event ID: 070192d5b0144587963788921b2d81df Event sequence: 1 Event occurrence: 1 Event detail code: 0 Application information: Application domain: /LM/W3SVC/1/ROOT/EnterpriseVault/Search-5-131338835453976369 Trust level: Full Application Virtual Path: /EnterpriseVault/Search Application Path: C:\Program Files (x86)\Enterprise Vault\EVSearch\EVSearchClient\ Machine name: EVserver Process information: Process ID: 45028 Process name: w3wp.exe Account name: NT AUTHORITY\SYSTEM Exception information: Exception type: ConfigurationErrorsException Exception message: Unrecognized attribute 'targetFramework'. Note that attribute names are case-sensitive. (C:\Program Files (x86)\Enterprise Vault\EVSearch\EVSearchClient\web.config line 113) Request information: Request URL: http://evault.local/EnterpriseVault/search/shell.aspx?server=EXCHMB3&mbx=SMTP:Jon.H@ev.local.com&version=1000000000&vaultid=15714FED411BF824D8AD959D8199351551110000evault&noBrowserSearch=1&outlook_redirect=1&Nav=0 Request path: /EnterpriseVault/search/shell.aspx 

Dtrace of the w3wp.exe process contains the following exception:

(w3wp)    <6700>    EV-H    {SOAP} Exception: The socket connection was aborted. This could be caused by an error processing your message or a receive timeout being exceeded by the remote host, or an underlying network resource issue. Local socket timeout was '23:58:59.9840000'. Info:SOAP Search request from user DOMAIN\vaultadmin(w3wp)    <6168>    EV-H    {EVS} Exception: The socket connection was aborted. This could be caused by an error processing your message or a receive timeout being exceeded by the remote host, or an underlying network resource issue. Local socket timeout was '23:58:59.9840000'. Info:Fault Exception received from SOAP API. |

This is caused by an unsupported version of McAfee Anti-Virus, specifically version 8.8 patch 8.