From Microsoft (link at bottom)
Use Intune’s security baselines to help you secure and protect your users and devices. Security baselines are pre-configured groups of Windows settings that help you apply a known group of settings and default values that are recommended by the relevant security teams. When you create a security baseline profile in Intune, you’re creating a template that consists of multiple device configuration profiles.
This feature applies to:
- Windows 10 version 1809 and later
You deploy security baselines to groups of users or devices in Intune, and the settings apply to devices that run Windows 10 or later. For example, the MDM Security Baseline automatically enables BitLocker for removable drives, automatically requires a password to unlock a device, automatically disables basic authentication, and more. When a default value doesn’t work for your environment, customize the baseline to apply the settings you need.
Separate baseline types can include the same settings but use different default values for those settings. It’s important to understand the defaults in the baselines you choose to use, and to then modify each baseline to fit your organizational needs.
Microsoft doesn’t recommend using preview versions of security baselines in a production environment. The settings in a preview baseline might change over the course of the preview.
Security baselines can help you to have an end-to-end secure workflow when working with Microsoft 365. Some of the benefits include:
- A security baseline includes the best practices and recommendations on settings that impact security. Intune partners with the same Windows security team that creates group policy security baselines. These recommendations are based on guidance and extensive experience.
- If you’re new to Intune, and not sure where to start, then security baselines gives you an advantage. You can quickly create and deploy a secure profile, knowing that you’re helping protect your organization’s resources and data.
- If you currently use group policy, migrating to Intune for management is much easier with these baselines. These baselines are natively built in to Intune, and include a modern management experience.
Available security baselines
The following security baseline instances are available for use with Intune. Use the links to view the settings for the most recent instance of each baseline.
- MDM Security Baseline
- Microsoft Defender ATP baseline (To use this baseline your environment must meet the prerequisites for using Microsoft Defender Advanced Threat Protection).
- Microsoft Defender ATP baseline for April 2020 – version 4
- Microsoft Defender ATP baseline for March 2020 – version 3
- Microsoft Edge Baseline
You can continue to use and edit profiles that you previously created based on a preview template, even when that preview template is no longer available for creating new profiles.
When you’re ready to move to a more recent version of a baseline you use, see Change the baseline version for a profile in this article.
About baseline versions and instances
Each new version instance of a baseline can add or remove settings or introduce other changes. For example, as new Windows 10 settings become available with new versions of Windows 10, the MDM Security Baseline might receive a new version instance that includes the newest settings.
In the Microsoft Endpoint Manager admin center, under Endpoint security > Security baselines you’ll see a list of the available baselines. The list includes:
- The baseline template name.
- How many profiles you have that use that baseline type.
- How many separate instances (versions) of the baseline type are available.
- A Last Published date that identifies when the latest version of the baseline template became available.
To view more information about the baseline versions you use, select a baseline type, like MDM Security Baseline to open its Profiles pane, and then select Versions. Intune displays details about the versions of that baseline that are in use by your profiles. The details include the most recent and current baseline version. You can select a single version to view deeper details about the profiles that use that version.
You can choose to change of the version of a baseline that’s in use with a given profile. When you change the version, you don’t have to create a new baseline profile to take advantage of updated versions. Instead you can select a baseline profile and use the built-in option to change the instance version for that profile to a new one.
Compare baseline versions
On the Versions pane for a security baseline is a list of each version of this baseline that you’ve deployed. This list also includes the most recent and active version of the baseline. When you create a new security baseline profile, the profile uses that most recent version of the security baseline. You can continue to use and edit profiles that you previously created that use an earlier baseline version, including baselines created using a Preview version.
To understand what’s changed between versions, select the checkboxes for two different versions, and then select Compare baselines. You’re then prompted to download a CSV file that details those differences.
The download identifies each setting in the two baseline versions, and notes if this setting has changed (notEqual) or has remained the same (equal). Details also include the default value for the setting by version, and if the setting was added to the more recent version, or removed from the more recent version.
You can use one or more of the available baselines in your Intune environment at the same time. You can also use multiple instances of the same security baselines that have different customizations.
When you use multiple security baselines, review the settings in each one to identify when your different baseline configurations introduce conflicting values for the same setting. Because you can deploy security baselines that are designed for different intents, and deploy multiple instances of the same baseline that includes customized settings, you might create configuration conflicts for devices that must be investigated and resolved.
In addition, security baselines often manage the same settings you might set with device configuration profiles or other types of policy. Therefore, remain aware of and consider your additional policies and profiles for settings when seeking to avoid or resolve conflicts.
Use the information at the following links to help identify and resolve conflicts:
Common tasks when you work with security baselines include:
- Create a profile – Configure the settings you want to use and assign the baseline to groups.
- Change the version – Change the baseline version in use by a profile.
- Remove a baseline assignment – Learn what happens when you stop managing settings with a security baseline.
- To manage baselines in Intune, your account must have the Policy and Profile Manager built-in role.
- Use of some baselines might require you to have an active subscription to additional services, like Microsoft Defender ATP.
Create the profile
- Sign in to the Microsoft Endpoint Manager admin center.
- Select Endpoint security > Security baselines to view the list of available baselines.
- Select the baseline you’d like to use, and then select Create profile.
- On the Basics tab, specify the following properties:
- Name: Enter a name for your security baselines profile. For example, enter Standard profile for Defender ATP.
- Description: Enter some text that describes what this baseline does. The description is for you to enter any text you want. It’s optional, but recommended.
- On the Configuration settings tab, view the groups of Settings that are available in the baseline you selected. You can expand a group to view the settings in that group, and the default values for those settings in the baseline. To find specific settings:
- Select a group to expand and review the available settings.
- Use the Search bar and specify keywords that filter the view to display only those groups that contain your search criteria.
- On the Scope tags tab, select Select scope tags to open the Select tags pane to assign scope tags to the profile.
- On the Assignments tab, select Select groups to include and then assign the baseline to one or more groups. Use Select groups to exclude to fine-tune the assignment.
- When you’re ready to deploy the baseline, advance to the Review + create tab and review the details for the baseline. Select Create to save and deploy the profile.As soon as you create the profile, it’s pushed to the assigned group and might apply immediately. TipIf you save a profile without first assigning it to groups, you can later edit the profile to do so.
- After you create a profile, edit it by going to Endpoint security > Security baselines, select the baseline type that you configured, and then select Profiles. Select the profile from the list of available profiles, and then select Properties. You can edit settings from all the available configuration tabs, and select Review + save to commit your changes.
Change the baseline version for a profile
You can change the version of the baseline instance that in use with a profile. When you change the version, you select an available instance of the same baseline. You can’t change between two different baseline types, such as changing a profile from using a baseline for Defender ATP to using the MDM security baseline.
While configuring a change of the baseline version, you can download a CSV file that lists the changes between the two baseline versions involved. You also have the choice to keep all your customizations from the original baseline version, or implement the new version using all of its default values. You don’t have the option to make changes to individual settings when you change the version of a baseline for a profile.
Upon saving, after the conversion is complete, the baseline is immediately redeployed to assigned groups.
- New settings that weren’t in the original version you were using are added and set to use the default values.
- Settings that aren’t in the new baseline version you select are removed and no longer enforced by this security baseline profile.When a setting is no longer managed by a baseline profile, that setting isn’t reset on the device. Instead, the setting on the device remains set to its last configuration until some other process manages the setting to change it. Examples of processes that can change a setting after you stop managing it include a different baseline profile, a group policy setting, or manual configuration that’s made on the device.
To change the baseline version for a profile
- Sign in to the Microsoft Endpoint Manager admin center.
- Select Endpoint security > Security baselines, and then select the tile for the baseline type that has the profile you want to change.
- Next, select Profiles, and then select the check box for the profile you want to edit, and then select Change Version.
- On the Change Version pane, use the Select a security baseline to update to dropdown, and select the version instance you want to use.
- Select Review update to download a CSV file that displays the difference between the profiles current instance version and the new version you’ve selected. Review this file so that you understand which settings are new or removed, and what the default values for these settings are in the updated profile.When ready, continue to the next step.
- Choose one of the two options for Select a method to update the profile:
- Accept baseline changes but keep my existing setting customizations – This option keeps the customizations you made to the baseline profile and applies them to the new version you’ve selected to use.
- Accept baseline changes and discard existing setting customizations – This option overwrites your original profile completely. The updated profile will use the default values for all settings.
- Select Submit. The profile updates to the selected baseline version and after the conversion is complete, the baseline immediately redeploys to assigned groups.
Remove a security baseline assignment
When a security baseline setting no longer applies to a device, or settings in a baseline are set to Not configured, those settings on a device don’t revert to a pre-managed configuration. Instead, the previously managed settings on the device keep their last configurations as received from the baseline until some other process updates those settings on the device.
Other processes that might later change settings on the device include a different or new security baseline, device configuration profile, Group Policy configurations, or manual edit of the setting on the device.
Duplicate a security baseline
You can create duplicates of your security baselines. A scenario when duplicating a baseline is useful is when you want to assign a similar but distinct baseline to a subset of devices. By creating a duplicate, you won’t need to manually recreate the entire baseline. Instead, you can duplicate any of your current baselines and then introduce only the changes the new instance requires. You might only change a specific setting and the group the baseline is assigned to.
When you create a duplicate, you’ll give the copy a new name. The copy is made with the same setting configurations and scope tags as the original, but won’t have any assignments. You’ll need to edit the new baseline to add assignments.
All security baselines support creating a duplicate.
After you duplicate a baseline, review and edit the new instance to make changes to its configuration.
To duplicate a baseline
- Sign in to the Microsoft Endpoint Manager admin center.
- Go to Endpoint security > Security baselines, select the type of baseline you want to duplicate, and then select Profiles.
- Right-click on the profile you want to duplicate and select Duplicate, or select the ellipsis (…) to the right of the baseline and select Duplicate.
- Provide a New name for the baseline, and then select Save.
After a Refresh, the new baseline profile appears in the admin center.
To edit a baseline
- Select the baseline, and then select Properties.
- Select Settings to expand the list of settings categories in the baseline. You can’t modify the settings from this view, but you can review how they’re configured.
- To modify the settings, select Edit for each category where you want to make a change:
- Scope tags
- Configuration settings
- After you’ve made changes, select Save to save your edits. You must save edits to one category before you can introduce edits to additional categories.
Older baseline versions
Microsoft Endpoint Manager updates the versions of built-in Security Baselines depending on the changing needs of a typical organization. Each new release results in a version update to a particular baseline. The expectation is that customers will be using the latest baseline version as a starting point to their Device Configuration profiles.
When there are no longer any profiles that use an older baseline listed in your tenant, Microsoft Endpoint Manager will only list the latest baseline version available.
If you have a profile associated with an older baseline, that older baseline will continue to be listed.
Security baselines on Intune-managed devices are similar to co-managed devices with Configuration Manager. Co-managed devices use Configuration Manager and Microsoft Intune to manage the Windows 10 devices simultaneously. It lets you cloud-attach your existing Configuration Manager investment to the benefits of Intune. Co-management overview is a great resource if you use Configuration Manager, and also want the benefits of the cloud.
When using co-managed devices, you must switch the Device configuration workload (its settings) to Intune. Device configuration workloads provides more information.
Q & A
Why these settings?
The Microsoft security team has years of experience working directly with Windows developers and the security community to create these recommendations. The settings in this baseline are considered the most relevant security-related configuration options. In each new build of Windows, the team adjusts its recommendations based on newly released features.
Is there a difference in the recommendations for Windows security baselines for group policy vs. Intune?
The same Microsoft security team chose and organized the settings for each baseline. Intune includes all the relevant settings in the Intune security baseline. There are some settings in the group policy baseline that are specific to an on-premises domain controller. These settings are excluded from Intune’s recommendations. All the other settings are the same.
Are the Intune security baselines CIS or NSIT compliant?
Strictly speaking, no. The Microsoft security team consults organizations, such as CIS, to compile its recommendations. But, there isn’t a one-to-one mapping between “CIS-compliant” and Microsoft baselines.
What certifications does Microsoft’s security baselines have?
- Microsoft continues to publish security baselines for group policies (GPOs) and the Security Compliance Toolkit, as it has for many years. These baselines are used by many organizations. The recommendations in these baselines are from the Microsoft security team’s engagement with enterprise customers and external agencies, including the Department of Defense (DoD), National Institute of Standards and Technology (NIST), and more. We share our recommendations and baselines with these organizations. These organizations also have their own recommendations that closely mirror Microsoft’s recommendations. As mobile device management (MDM) continues to grow into the cloud, Microsoft created equivalent MDM recommendations of these group policy baselines. These additional baselines are built in to Microsoft Intune, and include compliance reports on users, groups, and devices that follow (or don’t follow) the baseline.
- Many customers are using the Intune baseline recommendations as a starting point, and then customizing it to meet their IT and security demands. Microsoft’s Windows 10 RS5 MDM Security Baseline is the first baseline to release. This baseline is built as a generic infrastructure that allows customers to eventually import other security baselines based on CIS, NIST, and other standards. Currently, it’s available for Windows and will eventually include iOS/iPadOS and Android.
- Migrating from on-premises Active Directory group policies to a pure cloud solution using Azure Active Directory (AD) with Microsoft Intune is a journey. To help, there are group policy templates included in the Security Compliance Toolkit that can help manage hybrid AD and Azure AD-joined devices. These devices can get MDM settings from the cloud (Intune) and group policy settings from on-premises domain controllers as needed.
- View the settings in the latest versions of the available baselines:
- Check the status and monitor the baseline and profile