Prestart commands for task sequence media in System Center Configuration Manager
Applies to: System Center Configuration Manager (Current Branch)
You can create a prestart command in System Center Configuration Manager to use with boot media, stand-alone media, and prestaged media. The prestart command is a script or executable that runs before the task sequence is selected and can interact with the user in Windows PE. The prestart command can prompt a user for information and save it in the task sequence environment or query a task sequence variable for information. When the destination computer boots, the command-line is run before the policy is downloaded from the management point. Use the following procedures to create a script to use for the prestart command, distribute the content associated with the prestart command, and configure the prestart command in media.
Create a script file to use for the Prestart Command
Task sequence variables can be read and written by using the Microsoft.SMS.TSEnvironment COM object while the task sequence is running. The following example illustrates a Visual Basic script file that queries the _SMSTSLogPath task sequence variable to get the current log location. The script also sets a custom variable.
dim osd: set env = CreateObject("Microsoft.SMS.TSEnvironment") dim logPath ' You can query the environment to get an existing variable. logPath = env("_SMSTSLogPath") ' You can also set a variable in the OSD environment. env("MyCustomVariable") = "varname"
Create a Package for the Script File and Distribute the Content
After you create the script or executable for the prestart command, you must create a package source to host the files for the script or executable, create a package for the files (no program required), and then distribute the content to a distribution point.
For more information about creating a package, see Packages and programs.
For more information about distributing content, see Distribute content.
Configure the Prestart Command in Media
You can configure a prestart command in the Create Task Sequence Media Wizard for stand-alone media, bootable media, or prestaged media. For more information about the media types, see Create task sequence media. Use the following procedure to create a prestart command in media.
To create a prestart command in media
In the Configuration Manager console, click Software Library.
In the Software Library workspace, expand Operating Systems, and then click Task Sequences.
On the Home tab, in the Create group, click Create Task Sequence Media to start the Create Task Sequence Media Wizard.
On the Select Media Type page, select Stand-alone media, Bootable media, or Prestaged media, and then click Next.
Navigate to the Customization page of the wizard. For more information about configuring the other pages in the wizard, see Create task sequence media.
On the Customization page, specify the following information, and then click Next.
Select Enable prestart command.
In the Command line text box, enter the script or executable that you created for the prestart command.
Use cmd /C <prestart command> to specify the prestart command. For example, if you used TSScript.vbs as the name for your prestart command script, you would enter cmd /C TSScript.vbs for the command line. Where cmd /C opens a new Windows command interpreter window and uses the Path environment variable to find the prestart command script or executable. You can also specify the full path to the prestart command, but the drive letter could be different on computers with different drive configurations.
Select Include files for the prestart command.
Click Set to select the package that is associated with the prestart command files.
Click Browse to select the distribution point that hosts the content for the prestart command.
Complete the wizard.