Laerte, the article you linked to had a tip that worked for me. I did not have to grant all the perms noted in the article, specifically I did not need to add the Windows Account my SQL Server Credential is based on to any local Groups or grant all the WMI namespace perms listed.

All I needed to do was open WMI Control (wmimgmt.msc) and grant my Windows Account Remote Enable on the ROOT\CIMV2 namespace.

Artifacts:

------------------------------------------------------------

-- create credential

USE [master]

GO

CREATE CREDENTIAL [MyAuthenticatedUser]

WITH IDENTITY = N'MyComputer\MyAuthenticatedUser', SECRET = N'mypassword'

GO

------------------------------------------------------------

-- create proxy

USE [msdb]

GO

EXEC msdb.dbo.sp_add_proxy

@proxy_name = N'MyAuthenticatedUser',

@credential_name = N'MyAuthenticatedUser',

@enabled = 1

GO

EXEC msdb.dbo.sp_grant_proxy_to_subsystem

@proxy_name = N'MyAuthenticatedUser',

@subsystem_id = 12

GO

------------------------------------------------------------

-- create job

USE [msdb]

GO

BEGIN TRANSACTION

DECLARE @ReturnCode INT

SELECT @ReturnCode = 0

IF NOT EXISTS ( SELECT name

FROM msdb.dbo.syscategories

WHERE name = N'[Uncategorized (Local)]'

AND category_class = 1 )

BEGIN

EXEC @ReturnCode = msdb.dbo.sp_add_category

@class = N'JOB',

@type = N'LOCAL',

@name = N'[Uncategorized (Local)]'

IF (

@@ERROR <> 0

OR @ReturnCode <> 0

)

GOTO QuitWithRollback

END

DECLARE @jobId BINARY(16)

EXEC @ReturnCode = msdb.dbo.sp_add_job

@job_name = N'test ps',

@enabled = 1,

@notify_level_eventlog = 0,

@notify_level_email = 0,

@notify_level_netsend = 0,

@notify_level_page = 0,

@delete_level = 0,

@description = N'No description available.',

@category_name = N'[Uncategorized (Local)]',

@owner_login_name = N'sa',

@job_id = @jobId OUTPUT

IF (

@@ERROR <> 0

OR @ReturnCode <> 0

)

GOTO QuitWithRollback

EXEC @ReturnCode = msdb.dbo.sp_add_jobstep

@job_id = @jobId,

@step_name = N'test',

@step_id = 1,

@cmdexec_success_code = 0,

@on_success_action = 1,

@on_success_step_id = 0,

@on_fail_action = 2,

@on_fail_step_id = 0,

@retry_attempts = 0,

@retry_interval = 0,

@os_run_priority = 0,

@subsystem = N'PowerShell',

@command = N'$Volumes = get-WMIObject WIN32_Volume |where-object {$_.FreeSpace -ne $null};

$Volumes',

@database_name = N'master',

@flags = 0,

@proxy_name = N'MyAuthenticatedUser'

IF (

@@ERROR <> 0

OR @ReturnCode <> 0

)

GOTO QuitWithRollback

EXEC @ReturnCode = msdb.dbo.sp_update_job

@job_id = @jobId,

@start_step_id = 1

IF (

@@ERROR <> 0

OR @ReturnCode <> 0

)

GOTO QuitWithRollback

EXEC @ReturnCode = msdb.dbo.sp_add_jobserver

@job_id = @jobId,

@server_name = N'(local)'

IF (

@@ERROR <> 0

OR @ReturnCode <> 0

)

GOTO QuitWithRollback

COMMIT TRANSACTION

GOTO EndSave

QuitWithRollback:

IF (@@TRANCOUNT > 0)

ROLLBACK TRANSACTION

EndSave:

GO