Unable to add a task - AccessDenied

In Windows any unprivileged user can create a task for yourself in Interactive Token mode (“run only when user is logged on”). Looks like I can’t do that via TaskService. I’ve tried 2 ways:

	TaskService.Instance.AddTask("app_"+sid, QuickTriggerType.Logon, path, "-agent");

and

	using (var ts = new TaskService())
	{
		var td = ts.NewTask();
		td.Actions.Add(path, "-agent");
		var tr = td.Triggers.AddNew(TaskTriggerType.Logon);
		td.Principal.LogonType = TaskLogonType.InteractiveToken;
		ts.RootFolder.RegisterTaskDefinition("app_" + sid, td);
	}

[dahall]

After doing a little more research and testing, I found that in order to use the LogonTrigger as a non-privileged user you must specify the current user’s account (DOMAIN\username) in the UserId property and register the task as either interactive (default) or with the user account and password.

The following will work.

var td = ts.NewTask();
td.Actions.Add("notepad", null, null);
td.Triggers.Add(new LogonTrigger { UserId = System.Security.Principal.WindowsIdentity.GetCurrent().Name });
ts.RootFolder.RegisterTaskDefinition("Test", td);

Given this, I will be updating this library to automatically set that property in this condition.

[dahall]

@dahall Hello!! I’m having the same problem. I have a WPF application that needs to execute a exe for installing a program. To do this I’m creating a task scheduler that contains at path cmd.exe and for arguments the executable path. But when i try to create a task in my own computer, passing computer name, domain, user and password I receive “Unauthorazed error”. Stranger is when I pass to computer name a nome of a server or other computer it works very well. How is possible I can create a task in other computer but in my not? I create taskservice as bellow: using (TaskService ts = new TaskService(@"\\MyComputer", "username", "domain", "password")) { }

@longhibianca See this help link. Use null or "" for a local computer.