This feature will be removed in a future version of Microsoft SQL Server. Avoid using this feature in new development work, and plan to modify applications that currently use this feature.
The ImpersonateClient property exposes the security context for non-administrative users running xp_cmdshell.
xp_cmdshell, a Microsoft SQL Server system stored procedure, executes an operating system command, returning any results of command execution as text.
If TRUE, xp_cmdshell runs in the security context of the client connection.
If FALSE, xp_cmdshell runs in the security context of SQL Server Agent. The default is FALSE.