Security Requirements for Managing Services
To manage the Microsoft SQL Server and SQL Server Agent Services, use either SQL Server Configuration Manager or SQL Server Management Studio. Manage the services on clustered servers with the Cluster Administrator.
To manage the SQL Server service and set the server configuration options, you must be a member of the serveradmin fixed server role or the sysadmin fixed server role. Members of the Windows Administrators group can start and stop services and configure the server options that Windows provides.
SQL Server Configuration Manager and SQL Server Management Studio use Windows Management Instrumentation (WMI) to display and modify some of the server properties. To manage services and obtain the status of the services, the user must have rights to access the WMI object. In SQL Server Management Studio, the following server property pages use WMI:
Misc Server Settings