Reference:
https://docs.microsoft.com/en-us/azure/active-directory/users-groups-roles/licensing-group-advanced

You can invite guest users to the directory, to a group, or to an application. After you invite a user through any of these methods, the invited user's account is added to Azure Active Directory (Azure AD), with a user type of Guest. The guest user must then redeem their invitation to access resources. An invitation of a user does not expire.
The invitation will include a link to create a Microsoft account. The user can then authenticate using their Microsoft account. In this question, the vendors already have Microsoft accounts so they can authenticate using them.
In this solution, we are creating guest account invitations by using the New-AzureADMSInvitation cmdlet and specifying the -InvitedUserEmailAddress parameter.
Reference:
https://docs.microsoft.com/en-us/azure/active-directory/b2b/add-users-administrator
https://docs.microsoft.com/en-us/powershell/module/azuread/new-azureadmsinvitation?view=azureadps-2.0 This is a case study. Case studies are not timed separately. You can use as much exam time as you would like to complete each case. However, there may be additional case studies and sections on this exam. You must manage your time to ensure that you are able to complete all questions included on this exam in the time provided.
To answer the questions included in a case study, you will need to reference information that is provided in the case study. Case studies might contain exhibits and other resources that provide more information about the scenario that is described in the case study. Each question is independent of the other questions in this case study.
At the end of this case study, a review screen will appear. This screen allows you to review your answer and to make changes before you move to the next section of the exam. After you begin a new section, you cannot return to this section.
To start the case study
To display the first question in this case study, click the Next button. Use the buttons in the left pane to explore the content of the case study before you answer the questions. Clicking these buttons displays information such as business requirements, existing environment, and problem statements. When you are ready to answer a question, click the Question button to return to the question.
Overview
Fabrikam, Inc. is an electronics company that produces consumer products. Fabrikam has 10,000 employees worldwide.
Fabrikam has a main office in London and branch offices in major cities in Europe, Asia, and the United States.

Device1 has the Configuration Manager client installed so you can manage Device1 by using Configuration Manager.
To manage Device1 by using Microsoft Intune, the device has to be enrolled in Microsoft Intune. In the Co-management Pilot configuration, you configure a Configuration Manager Device Collection that determines which devices are auto-enrolled in Microsoft Intune. You need to add Device1 to the Device Collection. You do not need to create a device configuration profile from the Intune admin center. Therefore, this solution does not meet the requirements.
Reference:
https://docs.microsoft.com/en-us/configmgr/comanage/how-to-enable