In the Admin Console, go to Applications > Applications.

Enter Box in the search field.

Click the application name link for the Box app you want to modify.

Click the Provisioning tab and select Integration in the SETTINGS list > Click Edit > Select “Push Groups” and Save.

Click the Assignments tab and click Assign > Assign to Groups.

Click Assign to assign the group to Box.

Optional. Repeat step f to assign additional groups to Box.

Click Done.

Click the Push Groups tab and select By name or By rule in the PUSHED GROUPS list.

Enter the group name in the Enter a group to push the field and click Save

Login to https://portal.azure.com/.

Navigate to “Azure Active Directory” in Azure Services.
Or create a resource “Azure Active Directory” if you don’t have it.

Navigate to “Enterprise applications”.

Click the application name link for the app you want to modify.

In the application screen, navigate to “Users and groups” and click “Add user/group”.

Click “Users and groups” and select the groups that you want to assign to the app and click “Select”.

After selecting groups, click “Assign”.