"SharePoint server farm already exists in the servers list" error when trying to add SharePoint farm in Backup Exec.

Problem

Operation to add SharePoint farm in Backup Exec fails with error mentioned below:

Error Message

Pop Up Error:

Either the Sharepoint server farm already exists in the servers list or Backup Exec cannot access the server farm.  Check to see if the Sharepoint farm exists in the list of servers or check the farm's web server name and credentials.

Error in SPSWrapper log from SharePoint Web Server:

[1c20] 02/04/13 11:22:54 Getting BackupRestoreObject SharePoint Foundation Help Search
[1c20] 02/04/13 11:22:54 Inside GetBackupRestoreObject
[1c20] 02/04/13 11:22:54 Failed to build the data for topology backup 

NOTE: To generate SPSWrapper log enable Backup Exec Remote Agent debug logging on SharePoint Web Server. Please refer to related articles for more details.

Cause

Backup Exec remote agent could not generate SharePoint topology due to some issue with one of the SharePoint Service/Object. To confirm which service is causing the failure check the SPSWrapper log. In the debug log excerpt from SPSWrapper log pasted above it failed to generate information on 'SharePoint Foundation Help Search' object.

Refer SharePoint Admin Console and Event Viewer on SharePoint Web server for additional information on the object listed in the SPSWrapper log. One of the reasons for the error might be not able to connect to the database associated with the Object as listed in errors below:

Log Name: Application
Source: BkupExec: Backup Exec for Windows Server
Date: 2/11/2013 3:55:40 AM
Event ID: 0
Task Category: None
Level: Information
Keywords: Classic
User: N/A
Computer: SharePoint-WebServer
Description:
Cannot open database "WSS_Search_SharePoint-WebServer" requested by the login. The login failed.
Login failed for user 'BackupUser'.

Log Name: Application
Source: Microsoft-SharePoint Products-SharePoint Foundation
Date: 2/11/2013 3:55:40 AM
Event ID: 3760
Task Category: (3)
Level: Critical
Keywords:
User: BackupUser
Computer: SharePoint-WebServer
Description:
SQL Database 'WSS_Search_SharePoint-WebServer' on SQL Server instance 'SQLServer'not found. Additional error information from SQL Server is included below.

Cannot open database "WSS_Search_SharePoint-WebServer" requested by the login. The login failed.
Login failed for user 'BackupUser'.

Solution

Resolve the issue reported in Event Viewer Application Log.  

If the database associated with the problem object/service is not online bring it online.  Or if the database is not accessible due to permissions or other issues, resolve it and then try to add the SharePoint Farm.