SQL Server provides an API called Virtual Backup Device Interface (VDI) that enables independent software vendors to integrate SQL Server into their products for providing support for backup and restore operations, this is different than the SQL Server Native Backups which can take backups using BACKUP DATABASE T-SQL command.
When configuring Data Protector with MS SQL the user must be a sysadmin. More information can be found in Microsoft Documentation:
https://support.microsoft.com/en-us/kb/2926557
- SQL Server VDI backup and restore operations require Sysadmin privileges
The VDI connection requires the Sysadmin permission because the connection itself is capable of executing more than simple backup operations and involves shared resources between the client and server.
