Which solution meets these requirements?
Use Amazon FSx for Windows File Server.
Use Amazon Elastic File System (Amazon EFS).
Use AWS Storage Gateway in file gateway mode.
Deploy a Windows file server on two On Demand instances across two Availability Zones.
Explanations:
Amazon FSx for Windows File Server is designed for Windows environments, integrates with Active Directory, and offers high durability, throughput, and IOPS. It’s a fully managed service that supports SMB file shares.
Amazon Elastic File System (EFS) is a scalable file storage service for use with AWS Cloud services and on-premises resources. However, it is not specifically designed for Windows environments and does not integrate with Active Directory.
AWS Storage Gateway in file gateway mode allows on-premises applications to use cloud storage, but it is not a native file system for Windows and does not provide the same level of integration with Active Directory as FSx.
Deploying a Windows file server on EC2 instances requires manual management, lacks the built-in durability and high availability of managed services, and does not inherently integrate with Active Directory without additional configuration.
I deduce that the answer is:
Use Amazon FSx for Windows File Server.