The following requirements must be met before installation:
• Administrative privileges are required for the user executing the client installation.
• VSS Exchange Writer—required for Exchange agent.
• VSS SQL Writer—required for SQL Server agent.
• VSS Hyper-V Writer — required for Hyper-V agent.
• .NET 2.0 Framework or higher—required for legacy Exchange agent.
• Microsoft SQL Server Browser—required for legacy SQL Server agent.
• Approximately 1100MB of free space is required on the system drive (usually volume C:). This requirement applies even when installing on a volume other than C:.
• Single Instance Storage (SIS) on Windows Storage Server 2008 is not supported. It must be disabled for the agent to properly perform backups.
Note that VSS writers are not required for Windows 2000 and NT clients as these older environments do not use Microsoft VSS technology. Backup of Exchange and SQL data in these environments use the legacy SQL and Exchange agents.