1. Session Hosts Calculation: The requirements state there are 400 users per shift, which represents the total number of concurrent users that must be supported. The requirement also specifies a density of 16 concurrent users per session host.

• $Total Concurrent Users \div Concurrent Users per Session Host = Total Session Hosts$
• $400 \div 16 = 25$
• Therefore, 25 session hosts are needed.

1. vCPUs per Session Host Calculation: The requirements specify a "Medium" user workload. According to official Microsoft sizing guidelines for Azure Virtual Desktop, a medium workload (which includes apps like Microsoft Office and web browsers) recommends 4 users per vCPU.

• $Concurrent Users per Session Host \div Users per vCPU = Total vCPUs$
• $16 \div 4 = 4$
• Therefore, 4 vCPUs are required for each session host to support 16 medium-workload users. This selection meets the requirement while minimizing costs by not over-provisioning (e.g., choosing 8 or 16 vCPUs).

Microsoft Learn. (2024). Azure Virtual Desktop sizing guidelines. Retrieved November 13, 2025.

Section: "General sizing guidelines"

Content: This document provides the standard recommendations for user density based on workload type. It explicitly states the guideline for a Medium workload is 4 users per vCPU.