Create a device-based Conditional Access policy
With Intune, enhance Conditional Access in Azure Active Directory by adding mobile device compliance to the access controls. With Intune compliance policy that defines requirements for devices to be compliant, you can use a device's compliance status to either allow or block access to your apps and services. You can do this by creating a Conditional Access policy that uses the setting Require device to be marked as compliant.
A Conditional Access policy specifies the app or services you want to protect, the conditions under which the apps or services can be accessed, and the users the policy applies to. Although Conditional Access is an Azure AD premium feature, the Conditional Access node you access from Intune is the same node as accessed from Azure AD.
Before you set up Conditional Access, you'll need to set up Intune device compliance policies to evaluate devices based on whether they meet specific requirements. See Get started with device compliance policies in Intune.
Create Conditional Access policy
Sign in to the Microsoft Endpoint Manager admin center.
Select Endpoint security > Conditional Access > Policies > New policy.
Under Assignments, select Users and groups.
On the Include tab, identify the users or groups that this Conditional Access policy applies to. Once you've chosen groups or users to include, use the Exclude tab if there are any users, roles, or groups you want to exclude from this policy.
All users: Select this option to apply the policy to all users and groups, including internal and guest users.
Select users and groups: Select this option and specify one or more of the following options:
All guest users: Select this option to include or exclude external guest users (for example, partners, external collaborators)
Directory roles: Select one or more Azure AD roles to include or exclude users who are assigned these roles.
Users and groups: Select this option to search for and select individual users or groups you want include or exclude.
Test the policy against a smaller group of users to make sure it works as expected.
Under Assignments, select Cloud apps or actions.
On the Include tab, use available options to identify the apps and services you want to protect with this Conditional Access policy. Then you can use the Exclude tab if there are any apps or services you want to exclude from this policy.
All cloud apps: Select this option to apply the policy to all apps.
The Microsoft Azure Management app for access to the Azure portal, and the Microsoft Intune app are included in this list. Be sure to use the Exclude tab either here or in the Users and groups options to make sure you (or the users or groups you designate) are able to sign in to the Azure portal or Microsoft Endpoint Manager admin center.
Select apps: Select this option, choose Select, and then use the applications list to search for and select the apps or services you want to protect.
When ready, select Done.
Under Assignments, select Conditions.
Sign-in risk: Select Yes to use Azure AD Identity Protection sign-in risk detection with this policy, and then choose the sign-in risk levels the policy should apply to.
Device platforms: On the Include tab, identify the device platforms you want to this Conditional Access policy to apply to. Use the Exclude tab to exclude platforms from this policy.
Client apps: Select Yes to specify if the policy should apply to browser apps, mobile apps, and desktop clients.
Device state: The Conditional Access policy will apply to all device states unless you choose Yes and specifically exclude the states Device Hybrid Azure AD joined or Device marked as compliant (or both).
If you want to protect both Modern authentication clients and Exchange ActiveSync clients, create two separate Conditional Access policies, one for each client type. Although Exchange ActiveSync supports modern authentication, the only condition that is supported by Exchange ActiveSync is platform. Other conditions, including multi-factor authentication, are not supported. To effectively protect access to Exchange Online from Exchange ActiveSync, create a Conditional Access policy that specifies the cloud app Microsoft 365 Exchange Online and the client app Exchange ActiveSync with Apply policy only to supported platforms selected.
Under Access controls, select Grant. Configure what happens based on the conditions you've set up. You can select from the following options:
Block access: The users specified in this policy will be denied access to the apps under the conditions you've specified.
Grant access: The users specified in this policy will be granted access, but you can require any of the following further actions:
- Require multi-factor authentication: The user will need to complete additional security requirements, like a phone call or text.
- Require device to be marked as compliant: The device must be Intune compliant. If the device is noncompliant, the user will be given the option to enroll the device in Intune.
- Require Hybrid Azure AD joined device: Devices must be Hybrid Azure AD joined.
- Require approved client app: The device must use approved client apps.
- For multiple controls: Select Require all the selected controls so that all of the requirements are enforced when a device attempts to access the app.
Under Enable policy, select On.