Job powershell fail through scheduler

Question

I have a dilemma.  I am using the Windows Server 2012 scheduler to execute powershell scripts. 
To experiment, poured a new W2012, has created a new domain test.wan isolated network
- Created by user adm, appointed him as the domain administrator.
- Create a directory c:\temp
- Created script d:\backup\test.ps1 with content:
get-date >> c:\temp\log.txt
Login as test\adm and create scheduled job by executing powershell code:
Set-ExecutionPolicy RemoteSigned unRegister-ScheduledJob -Name Backup
$t = New-JobTrigger -Weekly -DaysOfWeek 1,2,3,4,5 -At 11:00PM
$cred = Get-Credential test\adm
$o = New-ScheduledJobOption -RunElevated
Register-ScheduledJob -Name Backup -FilePath d:\backup\test.ps1 -Trigger $t -Credential $cred -ScheduledJobOption $o
- Start the scheduler and manually run the task - write to the file worked.
- Then i
logout test\adm
Logged under test\Administrator
- Start the scheduler and manually run the task - write to a file does not work in the job log all ok .
- Launched cmd as test\adm
- Start the scheduler and manually run the task - write to the file worked.
Why ??
ps: On Windows Server 2008R2 is no such problem.

Answer 1

Hi AnnaWY.
1. Scheduled jobs created by test\adm and with permissions of test\adm by the Credential parameter in the Register-ScheduledJob (see above).
2. Schleuded job run Elevated and regardless of the user logon.
3. User have permission to run the commands or scripts.
When user test\adm have active session or any process runs as test\adm job start (manually or by scheduler trigger) and work properly.
When user test\adm not logged in job start (manually or by scheduler trigger) but nothing happen but job complete normally by job log.
PS C:\> Get-ScheduledJobOption Backup
StartIfOnBatteries : False
StopIfGoingOnBatteries : True
WakeToRun : False
StartIfNotIdle : True
StopIfGoingOffIdle : False
RestartOnIdleResume : False
IdleDuration : 00:10:00
IdleTimeout : 01:00:00
ShowInTaskScheduler : True
RunElevated : True
RunWithoutNetwork : True
DoNotAllowDemandStart : False
MultipleInstancePolicy : IgnoreNew
JobDefinition : Microsoft.PowerShell.ScheduledJob.ScheduledJobDefinition