Enterprise Vault(EV) Office Mail App(OMA) shows a blank panel.

Problem

Enterprise Vault(EV) Office Mail App(OMA) shows a blank panel after upgrading to EV Version 12.1.1 from 12.1.0.

Error Message

Clicking on  EV OMA in Outlook/OWA hows a blank panel.

IIS error 404 seen in Fiddler trace for the following: 

Request URL: https://EVServer.local/EnterpriseVault/V12.0.0.1528/OfficeMailApp/Redist/css/Style.css

Request URL: https://EVServer.locale/EnterpriseVault/V12.0.0.1528/OfficeMailApp/OfficeMailApp.css

Request URL: https://EVServer.local/EnterpriseVault/V12.0.0.1528/OfficeMailApp/OfficeMailApp.css

Request URL: https://EVServer.local/EnterpriseVault/V12.0.0.1528/OfficeMailApp/OfficeMailApp.js  

Cause

The 12.1.1 installer sets the registry value to an incorrect value of 12.0.0.1528. The 12.1 installer actually uses the folder name “V12.1.0.1424”, and so the Mail App tries to download its resources from the wrong location.

Workaround:
Modify the below registry key for the current EV Version:
Location:      HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\KVS\Enterprise Vault\Install
Value name:    WebAppResourceVersion
Value Data:    12.1.0.1424

Solution

This issue has been addressed in the following release:
 
Enterprise Vault 12.1.2 Release:
http://www.veritas.com/docs/000125196