As an IT consulting firm with a reputation of “Security First”, we are constantly on the lookout for ways to secure our client environments. With that being said, we recently discovered that while Microsoft does offer various solutions to secure your Microsoft 365 tenant environment, many of these security features are not enabled automatically. One example of this is ensuring that Microsoft Office 365 SharePoint infected files are disallowed for download. Surprisingly, Microsoft does not prevent users from downloading infected files that are hosted in SharePoint by default. Below I have provided instructions on how to configure your Microsoft 365 tenant to prevent your end users from having the ability to download infected files hosted in SharePoint.
1. Let’s begin by launching PowerShell as an administrator.
2. Input the following command in PowerShell & press “Enter”.
3. When prompted, be sure to type “Y” to install all required files & then press “Enter”.
4. Next, you will need to determine your organization’s unique SharePoint site URL. To do so, simply login to your 365 tenant portal and select “Show All” within the left navigation pane.
5. Next, select “SharePoint.
6. Make note of your organization’s unique SharePoint site URL as shown below.
7. Navigate back to PowerShell & update the below command to include your organization’s SharePoint URL.
8. You will now be prompted to authenticate utilizing your Microsoft Office 365 administrator credentials.
9. Once you have authenticated successfully, return to PowerShell and enter the following command.
10. To verify your recent configuration change, run the following command in PowerShell.
11. If download of infected files has been prohibited successfully, you should receive the below message.
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