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I don’t know if it should be like this. When I’m trying to do anything with xp_cmdshell procedure it almost every time gives me Access Denied.
For example I can’t create new .txt file, can’t create new user, nothing. I’m logged in with windows administrator user.
Is there any way to run this procedure with administrator privileges?
XP_CmdShell will execute under the context of the Service Account running the SQL Server Service. The service account needs the permissions to the external resources.
Could I point out however, that enabling xp_cmdshell is not a good idea. It opens lots of security holes. For example, if your app has an unknown volnerability to SQL injection, a hacker could do all sorts on your network that you rather avoid.
If you must use external resources then better approaches would include a CLR procedure or calling a Job that executes a CMDEXEC step.