Tutorial: Microsoft Entra single sign-on (SSO) integration with Box

In this tutorial, you'll learn how to integrate Box with Microsoft Entra ID. When you integrate Box with Microsoft Entra ID, you can:

• Control in Microsoft Entra ID who has access to Box.
• Enable your users to be automatically signed-in to Box with their Microsoft Entra accounts.
• Manage your accounts in one central location.

Prerequisites

To get started, you need the following items:

• A Microsoft Entra subscription. If you don't have a subscription, you can get a free account.
• Box single sign-on (SSO) enabled subscription.

Scenario description

In this tutorial, you configure and test Microsoft Entra SSO in a test environment.

• Box supports SP initiated SSO
• Box supports Automated user provisioning and deprovisioning (recommended)
• Box supports Just In Time user provisioning

Adding Box from the gallery

To configure the integration of Box into Microsoft Entra ID, you need to add Box from the gallery to your list of managed SaaS apps.

1. Sign in to the Microsoft Entra admin center as at least a Cloud Application Administrator.
2. Browse to Identity > Applications > Enterprise applications > New application.
3. In the Add from the gallery section, type Box in the search box.
4. Select Box from results panel and then add the app. Wait a few seconds while the app is added to your tenant.

Alternatively, you can also use the Enterprise App Configuration Wizard. In this wizard, you can add an application to your tenant, add users/groups to the app, assign roles, as well as walk through the SSO configuration as well. Learn more about Microsoft 365 wizards.

Configure and test Microsoft Entra SSO for Box

Configure and test Microsoft Entra SSO with Box using a test user called B.Simon. For SSO to work, you need to establish a link relationship between a Microsoft Entra user and the related user in Box.

To configure and test Microsoft Entra SSO with Box, perform the following steps:

1. Configure Microsoft Entra SSO - to enable your users to use this feature.
   1. Create a Microsoft Entra test user - to test Microsoft Entra single sign-on with B.Simon.
   2. Assign the Microsoft Entra test user - to enable B.Simon to use Microsoft Entra single sign-on.
2. Configure Box SSO - to configure the single sign-on settings on application side.
   1. Create Box test user - to have a counterpart of B.Simon in Box that is linked to the Microsoft Entra representation of user.
3. Test SSO - to verify whether the configuration works.

Configure Microsoft Entra SSO

Follow these steps to enable Microsoft Entra SSO.

1. Sign in to the Microsoft Entra admin center as at least a Cloud Application Administrator.

2. Browse to Identity > Applications > Enterprise applications > Box > Single sign-on.

3. On the Select a single sign-on method page, select SAML.

4. On the Set up single sign-on with SAML page, click the edit/pen icon for Basic SAML Configuration to edit the settings.

   

5. On the Basic SAML Configuration section, enter the values for the following fields:

   a. In the Sign on URL text box, type a URL using the following pattern: https://<SUBDOMAIN>.account.box.com

   b. In the Identifier (Entity ID) text box, type a URL: box.net

   c. In the Reply URL text box, type the URL: https://sso.services.box.net/sp/ACS.saml2

   Note

   The Sign-on URL value is not real. Update the value with the actual Sign-On URL. Contact Box Client support team to get the value. You can also refer to the patterns shown in the Basic SAML Configuration section.

6. Your Box application expects the SAML assertions in a specific format, which requires you to add custom attribute mappings to your SAML token attributes configuration. The following screenshot shows an example for this. The default value of Unique User Identifier is user.userprincipalname but Box expects this to be mapped with the user's email address. For that you can use user.mail attribute from the list or use the appropriate attribute value based on your organization configuration.

   

7. On the Set up single sign-on with SAML page, in the SAML Signing Certificate section, find Federation Metadata XML and select Download to download the certificate and save it on your computer.

   

Create a Microsoft Entra test user

In this section, you'll create a test user called B.Simon.

1. Sign in to the Microsoft Entra admin center as at least a User Administrator.
2. Browse to Identity > Users > All users.
3. Select New user > Create new user, at the top of the screen.
4. In the User properties, follow these steps:
   1. In the Display name field, enter B.Simon.
   2. In the User principal name field, enter the [email protected]. For example, [email protected].
   3. Select the Show password check box, and then write down the value that's displayed in the Password box.
   4. Select Review + create.
5. Select Create.

Assign the Microsoft Entra test user

In this section, you'll enable B.Simon to use single sign-on by granting access to Box.

1. Sign in to the Microsoft Entra admin center as at least a Cloud Application Administrator.

2. Browse to Identity > Applications > Enterprise applications > Box.

3. In the app's overview page, find the Manage section and select Users and groups.

4. Select Add user, then select Users and groups in the Add Assignment dialog.

5. In the Users and groups dialog, select B.Simon from the Users list, then click the Select button at the bottom of the screen.

6. If you are expecting a role to be assigned to the users, you can select it from the Select a role dropdown. If no role has been set up for this app, you see "Default Access" role selected.

7. In the Add Assignment dialog, click the Assign button.

Configure Box SSO

1. In a different web browser window, sign in to your Box company site as an administrator and follow the procedure in Set up SSO on your own.

Create Box test user

In this section, a user called Britta Simon is created in Box. Box supports just-in-time user provisioning, which is enabled by default. There is no action item for you in this section. If a user doesn't already exist in Box, a new one is created after authentication.

Test SSO

In this section, you test your Microsoft Entra single sign-on configuration with following options.

• Select Test this application. You're redirected to the Box Sign-on URL, where you can initiate the login flow.

• Go to Box Sign-on URL directly and initiate the login flow from there.

• You can use Microsoft My Apps. When you click the Box tile in the My Apps, this will redirect to Box Sign-on URL. For more information about the My Apps, see Introduction to the My Apps.

Push an Azure group to Box

You can push an Azure group to Box and sync that group. Azure pushes groups to Box via an API-level integration.

1. In Users & Groups, search for the group you want to assign to Box.
2. In Provisioning, ensure that Synchronize Microsoft Entra groups to Box is selected. This setting syncs the groups that you allocated in the preceding step. It might take some time for these groups to be pushed from Azure.

Next steps

Once you configure Box you can enforce Session Control, which protects exfiltration and infiltration of your organization’s sensitive data in real time. Session Control extends from Conditional Access. Learn how to enforce session control with Microsoft Defender for Cloud Apps.