Microsoft Graph and PowerShell

This is a post about using PowerShell and Microsoft Graph to access data in Azure AD, Intune and Office 365. The GUI management of these Microsoft 365 technologies is constantly evolving, but there will always be things that can’t be done that way. Microsoft Graph approaches the problem from the other direction. It provides an endpoint and API to access the entire dataset. You can then write your own scripts or applications, using the object model of the whole of the Microsoft 365 suite of products.

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MDAC FilePath Rules and Drivers

The new File Path rules in Microsoft Defender Application Control (MDAC) allow EXE and DLL files in the path, but not SYS, or MSI or script files. This is curious and, as far as I know, undocumented. And it means that we cannot simply allow all files in C:\Windows. If we do that, the system will not boot because the drivers will still be blocked. We will need to use another method to add drivers to an MDAC policy.

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MDAC or WDAC

The Application Control feature in Windows 10 was originally called Device Guard Code Integrity. This was brought under the Defender umbrella of security technologies as Windows Defender Application Control (WDAC). Microsoft earlier this year announced that Windows Defender would become cross-platform (with a version of Defender antivirus for macOS) and be renamed Microsoft Defender.

In my blog posts I have called it Microsoft Defender Application Control (MDAC). You can see in the screenshot below that all the Defender technologies for Windows 10 Endpoint Protection, in Intune, are now Microsoft Defender.

Intune Endpoint Protection Policies