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. The Microsoft SQL Server product team is evaluating this requirement for the next major version of SQL server, and this Microsoft Knowledge Base (KB) article will be updated when additional information is available.
For additional information about SQL Server backup and restore operations, consult the following Microsoft TechNet webpage:
For additional information about Volume Shadow Copy Service (VSS) and VDI backups in SQL server, consult the following MSDN blog post:
Application vendors can consult the following guide for additional information about using VSS for SQL server backups: