B: Azure Storage supports using Azure Active Directory (Azure AD) to authorize requests to blob data. With Azure AD, you can use Azure role-based access control (Azure RBAC) to grant permissions to a security principal, which may be a user, group, or application service principal.
The security principal is authenticated by Azure AD to return an OAuth 2.0 token. The token can then be used to authorize a request against the Blob service.
You can scope access to Azure blob resources at the following levels, beginning with the narrowest scope:
* An individual container. At this scope, a role assignment applies to all of the blobs in the container, as well as container properties and metadata.
* The storage account.
* The resource group.
* The subscription.
* A management group.
D: You can securely access data in an Azure Data Lake Storage Gen2 (ADLS Gen2) account using OAuth 2.0 with an Azure Active Directory (Azure AD) application service principal for authentication. Using a service principal for authentication provides two options for accessing data in your storage account:
A mount point to a specific file or path
Direct access to data
Incorrect:
Not C: To enable AD DS authentication over SMB for Azure file shares, you need to register your storage account with AD DS and then set the required domain properties on the storage account.
To register your storage account with AD DS, create an account representing it in your AD DS.
Reference:
https://docs.microsoft.com/en-us/azure/storage/blobs/authorize-access-azure-active-directory
https://docs.microsoft.com/en-us/azure/databricks/data/data-sources/azure/adls-gen2/azure- datalake-gen2-sp-access

To allow access to only low-risk external SaaS apps in a Microsoft 365 environment with Defender XDR and Intune, you can use Microsoft Entra Conditional Access policies. These policies can leverage Learn Microsoft's Defender for Endpoint data to restrict access based on device compliance and threat level. Specifically, you can create policies that require a device to be compliant or have an app protection policy applied before allowing access to specific SaaS apps.
Reference:
https://learn.microsoft.com/en-us/defender-cloud-apps/posture-overview
https://learn.microsoft.com/en-us/defender-cloud-apps/proxy-intro-aad

Azure Active Directory's Application Proxy provides secure remote access to on-premises web applications. After a single sign-on to Azure AD, users can access both cloud and on-premises applications through an external URL or an internal application portal.
Azure AD Application Proxy is: Secure. On-premises applications can use Azure's authorization controls and security analytics. For example, on-premises applications can use Conditional Access and two-step verification. Application Proxy doesn't require you to open inbound connections through your firewall.
Simple to use. Users can access your on-premises applications the same way they access Microsoft 365 and other SaaS apps integrated with Azure AD. You don't need to change or update your applications to work with Application Proxy.
Reference:
https://docs.microsoft.com/en-us/azure/active-directory/app-proxy/application-proxy

https://learn.microsoft.com/en-us/microsoft-365/security/office-365-security/recover-from- ransomware?view=o365-worldwide