References:
https://docs.microsoft.com/en-us/azure/storage/common/storage-account-options

C: Obtain the root CA certificate (step 4 in the picture below)
D: From KV1, create a certificate signing request (CSR) (step 2 in the picture below) Note:
Creating a certificate with a CA not partnered with Key Vault
This method allows working with other CAs than Key Vault's partnered providers, meaning your organization can work with a CA of its choice.

The following step descriptions correspond to the green lettered steps in the preceding diagram.
In the diagram above, your application is creating a certificate, which internally begins by creating a key in your key vault.
Key Vault returns to your application a Certificate Signing Request (CSR).
Your application passes the CSR to your chosen CA.
Your chosen CA responds with an X509 Certificate.
Your application completes the new certificate creation with a merger of the X509 Certificate from your CA.
Reference:
https://docs.microsoft.com/en-us/azure/key-vault/certificates/certificate-scenarios
Topic 1, Contoso, Ltd
Overview
Contoso, Ltd. is a manufacturing company that has offices worldwide. Contoso works with partner organizations to bring products to market.
Contoso products are manufactured by using blueprint files that the company authors and maintains.
Existing Environment
Currently, Contoso uses multiple types of servers for business operations, including the following:
* File servers
* Domain controllers
* Microsoft SQL Server servers
Your network contains an Active Directory forest named contoso.com. All servers and client computers are joined to Active Directory.
You have a public-facing application named App1. App1 is comprised of the following three tiers:
* A SQL database
* A web front end
* A processing middle tier
Each tier is comprised of five virtual machines. Users access the web front end by using HTTPS only.
Requirements
Planned Changes
Contoso plans to implement the following changes to the infrastructure:
* Move all the tiers of App1 to Azure.
* Move the existing product blueprint files to Azure Blob storage.
* Create a hybrid directory to support an upcoming Microsoft Office 365 migration project.
Technical Requirements
Contoso must meet the following technical requirements:
* Move all the virtual machines for App1 to Azure.
* Minimize the number of open ports between the App1 tiers.
* Ensure that all the virtual machines for App1 are protected by backups.
* Copy the blueprint files to Azure over the Internet.
* Ensure that the blueprint files are stored in the archive storage tier.
* Ensure that partner access to the blueprint files is secured and temporary.
* Prevent user passwords or hashes of passwords from being stored in Azure.
* Use unmanaged standard storage for the hard disks of the virtual machines.
* Ensure that when users join devices to Azure Active Directory (Azure AD), the users use a mobile phone to verify their identity.
Minimize administrative effort whenever possible.
User Requirements
Contoso identifies the following requirements for users:
Ensure that only users who are part of a group named Pilot can join devices to Azure AD.
Designate a new user named Admin1 as the service administrator of the Azure subscription.
Ensure that a new user named User3 can create network objects for the Azure subscription

Explanation:
Enterprise State Roaming provides users with a unified experience across their Windows devices and reduces the time needed for configuring a new device.
Box 1: Yes
Box 2: No
Box 3: Yes
References:
https://docs.microsoft.com/en-us/azure//////active-directory/devices/enterprise-state-roaming-overview

Explanation
Typically, you use Conditional Access to control access to your cloud apps. You can also set up policies to control access to Azure management.
The policy you create applies to all Azure management endpoints, including the following:
* Azure portal
* Azure Resource Manager provider
* Classic Service Management APIs
* Azure PowerShell
* Visual Studio subscriptions administrator portal
* Azure DevOps
* Azure Data Factory portal
To create a policy for Azure management, you select Microsoft Azure Management under Cloud apps when choosing the app to which to apply the policy.

Reference:
https://docs.microsoft.com/en-us/azure/role-based-access-control/conditional-access-azure-management
https://www.rebeladmin.com/2019/04/step-step-guide-restrict-azure-ad-administration-portal/