HostPool1 contains Windows 10 session hosts and various application groups. To assign a Windows 11 Desktop application group to users, what should you do first?

To assign a Windows 11 Desktop application group, you must first create a new host pool. Host pools determine the operating system of the session hosts they contain. HostPool1 already contains Windows 10 session hosts, so it cannot host Windows 11 desktops. A new host pool specifically configured for Windows 11 is required. Creating a scaling plan is for managing host pool capacity, not for defining OS versions. Creating a new workspace is for grouping application groups and host pools, which comes after the host pool is established. Adding a session host to HostPool1 would only add another Windows 10 machine, not a Windows 11 one.