Explanation:
Box 1: User2 and User3 only
Job title property for directory synched users cannot be updated from Azure AD.
Box 2: User1, User2, and User3
Invite users with Azure Active Directory B2B collaboration, Update user's name and usage location.
To assign a license, the invited user's Usage location must be specified. Admins can update the invited user's profile on the Azure portal.
1. Go to Azure Active Directory > Users and groups > All users. If you don't see the newly created user, refresh the page.
2. Click on the invited user, and then click Profile.
3. Update First name, Last name, and Usage location.
4. Click Save, and then close the Profile blade.
Reference:
https://docs.microsoft.com/en-us/azure/active-directory/fundamentals/active-directory-users-profile-azure-portal
https://docs.microsoft.com/en-us/power-platform/admin/invite-users-azure-active-directory-b2b-collaboration#update-users-name-and-usage-location