Which tool is essential for discovering servers during a migration to Azure using Azure Migrate?

The Azure Migrate appliance is the essential tool for discovering servers during a migration to Azure using Azure Migrate. This appliance plays a crucial role as it facilitates the discovery and assessment of on-premises servers, applications, and dependencies. By deploying the Azure Migrate appliance within your environment, it can gather detailed information about your local infrastructure, including the configuration of virtual machines and associated data, which is vital for planning a successful migration to Azure.

This tool simplifies the migration process by automating the collection and analysis of necessary data, which is then used to provide insights into resource usage, suitability for Azure, and potential cost implications. It enables organizations to efficiently move their workloads to the cloud by offering a clear picture of their existing server environment and how it translates to Azure.

The other options, while valuable in their own contexts, do not serve the primary function of server discovery in the migration process. For example, the Azure Portal is used for managing resources in Azure rather than for initial discovery, Azure Logic Apps focuses on automating workflows, and PowerShell scripts may assist in various tasks but are not specifically designed for the comprehensive discovery of servers in the migration context.