Install EV 10 Cluster Passive Node error.

Call, Symantec support, and got the solution:

Issue

An upgrade or reinstall of Enterprise Vault results in an error indicating that the SQL Server Reporting Services has not been detected.
 
 
Error

Microsoft SQL Server Reporting Services has not been detected, or an unsupported version is present.
 
 
 
 
Cause

The error is caused by the fact that Enterprise Vault Reporting services has been previously installed on the Enterprise Vault server.

 
Solution

1). Start - Run - Regedit

2). Expand HKLM\SOFTWARE\KVS\Enterprise Vault\Install\
      or
      Expand HKLM\SOFTWARE\Wow6432Node\KVS\Enterprise Vault\Install
3). Double-click EVOMReporting
4). Change the Value from "Installed" to "Not Installed". Click Ok to save the changes. 
5). Close the registry. The installation should now proceed without generating the error.