An administrator wants to allow users to login to the vSphere Web Client using the Use Windows session authentication check box for faster authentication. Which three requirements must be met for…

The Client Integration Plug-in is a client-side browser extension installed on end-user workstations, not on the vCenter Server or Platform Services Controller appliance.

The Client Integration Plug-in must be installed on each user workstation because it is the browser extension that intercepts the Kerberos/Windows session token and passes it to the vSphere Web Client for authentication. Without it on the local machine, the checkbox does not appear or function.

Windows session authentication relies on Kerberos tickets issued by Active Directory; if a user is logged in with a local account rather than a domain account, no valid AD credential exists to pass through.

vCenter Single Sign-On must have an Identity Source configured for the AD domain so it can validate the Kerberos ticket presented by the plug-in and map the user to vCenter roles.

While Integrated Windows Authentication is a related concept, the specific requirement for the SSO Identity Source is that it must be valid and mapped to the user domain, making D the correct phrasing; E is either redundant or refers to a different authentication type not required here.