A branch office in Toronto hosts a VM (VM1) as a file server accessed by users at multiple offices. You must ensure users can access the shared files with minimal delay if the Toronto office becomes inaccessible. Which solution should you recommend?

The correct solution is an Azure file share and Azure File Sync. An Azure file share provides a highly available, cloud-based file share that can be accessed from anywhere. Azure File Sync allows you to cache frequently accessed files locally at the Toronto office, providing fast access for local users, while synchronizing all changes to the Azure file share. If the Toronto office becomes inaccessible, users from other offices can directly access the files stored in the Azure file share with minimal delay, ensuring business continuity. Using a Recovery Services vault and Windows Server Backup (option a) or Azure Backup (option c) primarily focuses on disaster recovery for the VM itself, not on providing continuous access to the file share from other locations during an outage. Azure blob containers (option b) are object storage and do not natively support the SMB protocol required for file shares, making them unsuitable for direct replacement of a file server without significant application changes.