Well, it’s really not too complicated. Done it a few times, unfortunately my 
SSDs with my scripts on are currently residing on the other side of the planet. 
As soon as I have them with me, I’ll share the code on my blog.

 

David

 

From: [email protected] [mailto:[email protected]] On 
Behalf Of Daniel Ratliff
Sent: 19 March 2014 08:46
To: '[email protected]'; '[email protected]'
Subject: RE: [mssms] Modify Task Sequences with a Script

 

Hmm is it still leveraging wmi?

-Daniel Ratliff

-----Original Message-----
From: Ryan [[email protected] <mailto:[email protected]> ]
Sent: Tuesday, March 18, 2014 05:30 PM Eastern Standard Time
To: [email protected] <mailto:[email protected]> 
Subject: Re: [mssms] Modify Task Sequences with a Script

Cool, I voted it up also.  Thanks! 

 

There is some C# code in the SDK I've found to add steps to a task sequence. I 
may look at taking that information and creating some functions or cmdlets to 
do this.

 

On Tue, Mar 18, 2014 at 4:03 PM, Trevor Sullivan <[email protected] 
<mailto:[email protected]> > wrote:

Voted.

 

Cheers,

Trevor Sullivan

 

From: [email protected] <mailto:[email protected]>  
[mailto:[email protected] <mailto:[email protected]> 
] On Behalf Of Daniel Ratliff
Sent: Tuesday, March 18, 2014 4:01 PM


To: [email protected] <mailto:[email protected]> 
Subject: RE: [mssms] Modify Task Sequences with a Script

 

Here you go. Vote away! Also threw a post out on myItForum. Feel free to put 
any suggestions out there. 

 

https://connect.microsoft.com/ConfigurationManagervnext/feedback/details/836341/dcr-ability-to-modify-existing-task-sequence-via-powershell-wmi

 

From: [email protected] <mailto:[email protected]>  
[mailto:[email protected] <mailto:[email protected]> 
] On Behalf Of Daniel Ratliff
Sent: Tuesday, March 18, 2014 3:18 PM
To: [email protected] <mailto:[email protected]> 
Subject: RE: [mssms] Modify Task Sequences with a Script

 

Hmm, great idea for a DCR. Ill open it on Connect later today, unless someone 
beats me to it.

 

From: [email protected] <mailto:[email protected]>  
[mailto:[email protected]] 
<mailto:[mailto:[email protected]]>  On Behalf Of Trevor Sullivan
Sent: Tuesday, March 18, 2014 3:14 PM
To: [email protected] <mailto:[email protected]> 
Subject: RE: [mssms] Modify Task Sequences with a Script

 

+1

 

I just tried writing up the script below, but it didn’t end up persisting the 
changes.

 

Cheers,

Trevor Sullivan

 

# Specify the task sequence package ID

$PackageID = 'LAB00012';

 

# 1. Get the task sequence package using fully qualified WMI path

$TaskSequence = 
[wmi]"root\sms\site_lab:SMS_TaskSequencePackage.PackageID='LAB00012'";

# 2. Get reference to the SMS_TaskSequence class

$TsClass = [wmiclass]"root\sms\site_lab:SMS_TaskSequence"

# 3. Load the XML from the task sequence's "Sequence" property into a 
SMS_TaskSequence instance

$TS = $TsClass.LoadFromXml($TaskSequence.Sequence).ReturnValue;

 

# 4. Get a reference to one of the task sequence step types

$SetVarClass = [wmiclass]"root\sms\site_lab:SMS_TaskSequence_SetVariableAction"

# 5. Instantiate the task sequence action class

$NewSetVarAction = $SetVarClass.CreateInstance();

# 6. Set appropriate properties on the Action

$NewSetVarAction.Name = '[PowerShell] Set Variable';

$NewSetVarAction.VariableName = 'OSDPreserveDriveLetter';

$NewSetVarAction.VariableValue = 'False';

 

# 7. Add the Action to the task sequence steps

$TS.Steps += $NewSetVarAction;

# 8. Commit the modified WMI object back into XML

$NewTS = $TsClass.SaveToXml($TS);

# 9. Set the XML on the Sequence property of the SMS_TaskSequence

$TaskSequence.Sequence = $NewTS.ReturnValue;

# 10. Commit the task sequence changes to WMI

$TaskSequence.Put();

 

 

From: [email protected] <mailto:[email protected]>  
[mailto:[email protected]] 
<mailto:[mailto:[email protected]]>  On Behalf Of Daniel Ratliff
Sent: Tuesday, March 18, 2014 2:02 PM
To: [email protected] <mailto:[email protected]> 
Subject: RE: [mssms] Modify Task Sequences with a Script

 

I have tried this for a good year now. I can export them and document them, but 
don’t have a way to edit them on the fly without creating new ones with the 
changes. 

 

From: [email protected] <mailto:[email protected]>  
[mailto:[email protected]] 
<mailto:[mailto:[email protected]]>  On Behalf Of Ryan
Sent: Tuesday, March 18, 2014 2:52 PM
To: [email protected] <mailto:[email protected]> 
Subject: [mssms] Modify Task Sequences with a Script

 

Does anyone here know how to modify a task sequence with a script?

 

I'm taking adding task sequence variables, application install steps, driver 
steps, etc etc...

 

I'd very much like to make tools to make some task sequence creation steps 
easier and I don't want to have to learn C# to do it.

 


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and may contain CONFIDENTIAL material. If you receive this material/information 
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