App Attach is the current AVD feature that dynamically delivers applications as packages attached at sign-in instead of installing them on the image (it is the successor to the retired MSIX App Attach). AZ-140 covers creating packages and attaching them to session hosts.
Azure Virtual Desktop (AVD) is Microsoft's cloud service for delivering virtualized Windows desktops and remote apps from Azure to any device.
A Host Pool is a collection of Azure virtual machines (session hosts) that share the same configuration and serve AVD users.
A Session Host is a virtual machine in a host pool that runs the Windows OS and hosts user sessions and apps.
An Application Group is an AVD construct that publishes either a full desktop (DesktopApplicationGroup) or a set of RemoteApps (RemoteAppApplicationGroup) from a host pool to assigned users.
A RemoteApp is an individual application published from an AVD host pool so it appears to run locally on the user's device while executing on the session host.
FSLogix is the profile-management technology that stores a user's Windows profile in a container on shared storage so it roams across session hosts.
A Profile Container is the FSLogix VHD/VHDX that holds a user's entire Windows profile and is attached at sign-in on a session host.
Cloud Cache is an FSLogix feature that keeps a local cache and writes profile data to multiple storage providers for resiliency and high availability.
App Attach is the current AVD feature that dynamically delivers applications as packages attached at sign-in instead of installing them on the image (it is the successor to the retired MSIX App Attach).
RDP Shortpath is an AVD transport that establishes a direct UDP connection between the client and session host for lower latency and better performance.
Autoscale is the native AVD scaling plan that automatically starts and stops session hosts based on schedules and demand to control cost.
Microsoft Entra ID is Microsoft's cloud identity service (formerly Azure Active Directory) used to authenticate and authorize AVD users and devices.
Conditional Access is the Microsoft Entra policy engine that grants or blocks access based on signals such as user, device, location, and risk.
Single Sign-On (SSO) lets AVD users authenticate once with Microsoft Entra ID and connect to session hosts without re-entering credentials.
Azure Compute Gallery is the Azure service for storing, versioning, and distributing custom VM images at scale across regions.