To migrate virtual machines from VMware vSphere to Azure, you need to use Azure Migrate, which is a service that helps you assess and migrate your on-premises workloads to Azure. Azure Migrate uses an appliance that you deploy as an Open Virtualization Application (OVA) template to vSphere. The appliance discovers the virtual machines and sends metadata and performance data to Azure Migrate. You can then use Azure Migrate to assess the readiness, cost, and sizing of the virtual machines for migration. You can also use Azure Migrate to replicate and migrate the virtual machines to Azure. Reference: About Azure Migrate Prepare VMware servers for assessment and migration to Azure with Azure Migrate Server Migration