Intune PowerShell - Enforce script signature check

Question

Could someone explain the PowerShell script Enforce script signature check in the Intune Portal?

https://intune.microsoft.com/#view/Microsoft_Intune_DeviceSettings/DevicesMenu/~/powershell

There isn't any documentation or instructional piece available on the process or the signed script sample.

I would be very grateful for any assistance.

Thanks,

Answer 1

@EnterpriseArchitect, Thanks for posting in Q&A. The "Enforce script signature check" setting in the Intune Portal is used to determine whether a PowerShell script must be signed by a trusted publisher before it can be executed on a device. When the "Enforce script signature check" setting is enabled, scripts need to be signed, and the certificate is added to the Trusted Publishers certificate store of the device. If you are using third-party scripts that are signed, make sure the certificate is in the Trusted Publishers certificate store. As with any certificate, the certificate authority must be trusted by the device.

Hope the above information can help.

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Answer 2

https://learn.microsoft.com/en-us/mem/intune/apps/intune-management-extension

• Enforce script signature check: Select Yes (default) if the script must be signed by a trusted publisher. Select No if there isn't a requirement for the script to be signed.

Not knowing anything about Intune, I'd guess it's doing the same thing as setting the PowerShell execution policy to "AllSigned" but doing it in a way that works for devices other than Windows. In other words, it's only going to allow you to use signed scripts and doing the enforcement in Intune rather than on the device.

https://learn.microsoft.com/en-us/powershell/module/microsoft.powershell.core/about/about_signing?view=powershell-7.3

Answer 3

To enable this option and execute PowerShell scripts successfully, ensure the following:

1. Use a Code Signing Certificate to Sign your PS Script.
2. Ensure that the root of the Code Signing Certificate is Installed on the target Windows device in the Trusted Root Certificate Authorities store.

Usually, when you utilize third-party CAs like Comodo or DigiCert to sign your PowerShell script, the root certificate is already present on your Windows device. In such cases, there's no need to deploy it, eliminating one additional step.

Unless you have this setup in place, you can choose Enforce script signature check - No to make sure your custom scripts are deploying and executing successfully on the target devices via intune.

To access the Trusted Root Certification Authorities folder in Windows, press Windows + R, type certlm.msc in the Run box, and press Enter.

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Answer 4

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