Product : Microsoft Corp, Azure Stack/1903, IaaS + PaaS
Feature : VM Type - Memory Optimized, Compute, Infrastructure Services
Content Owner:  John Gallucci
Summary
Memory optimized VMs are D-series, DS-series, Dv2-series, DSv2-series
Details
https://docs.microsoft.com/en-us/azure/azure-stack/user/azure-stack-vm-sizes#memory-optimized