Which feature allows Azure Virtual Desktop to support flexible scaling?

The feature that enables Azure Virtual Desktop to support flexible scaling is multi-session user capabilities. This functionality allows multiple users to connect to a single virtual machine simultaneously, optimizing resources and reducing costs. It means that organizations can run applications on fewer virtual machines while providing each user with their own personalized desktop experience. This flexibility is particularly beneficial in environments with fluctuating usage patterns, as it allows administrators to scale up or down based on demand without needing to provision a separate virtual machine for each user.

In contrast, the other options do not specifically provide the same level of scaling flexibility. Virtual network connections are important for connectivity and security but do not directly impact the number of user sessions managed. Integration with Microsoft Teams enhances collaboration but doesn't influence the way resources are allocated or scaled. Subscription-based licensing offers a cost structure but is not a feature that actively facilitates the scaling of virtual environments.