The SharePoint Agent has the following requirements:
The Backup Exec Remote Agent for Windows Systems (Remote Agent) must be installed on each remote SharePoint Portal Server that will be protected. In addition, for SharePoint Server 2003/2007, the Remote Agent must be installed on each SQL server in the server farm.
The credentials specified by the logon account used for backing up and restoring SharePoint Portal Server data must have local administrative rights on the servers where SharePoint components are installed. Additionally, to back up and restore individual items in workspaces or backward-compatible document libraries, the account must be granted the Coordinator role in SharePoint on all folders to be accessed in the workspace or document library.
The credentials specified by the logon account used for backing up and restoring the Single Sign-on database must be either the account name or a member of the group that is specified in the "Account name" field in the Single Sign-on Settings section of the Manage Settings for Single Sign-on administration page in SharePoint Portal Server.
Internet Information Services (IIS) rights can affect database backups and restores. Ensure that the logon account used for backup and restore has rights to access the IIS sites. Integrated Windows Security should be enabled within the IIS rights.