WORKAROUND:
1. Login to the SharePoint server and locate the STSADM.exe tool. Obtain the path and take a copy of it. Note that the path may not be the same for Sharepoint 2007 Server and Sharepoint 2010 server.
2. Open Netvault Admin Console and go the Backup Window
3. Browse the client where the Sharepoint Plugin is installed. This is the Sharepoint server.
4. Fill all the required fields.
In the STSADM path insert the ABSOLUTE path of the STSADM.exe. It should be like this:
C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\BIN\STSADM.EXE
