Which feature is NOT supported by vSphere when using Intel Software Guard Extensions?

vSphere vMotion does not support Intel Software Guard Extensions (SGX). Intel SGX is designed to provide security features, specifically isolating applications and protecting their data from disclosure or modification, even when the host environment is compromised. When using SGX, certain features in vSphere that rely on the seamless migration of virtual machines, like vMotion, cannot be utilized due to the requirements for maintaining integrity and isolation of the secure enclaves.

The other features, such as Storage I/O Control, VM encryption, and Fault tolerance, can still function alongside SGX. Storage I/O Control manages resources for virtual machines to ensure optimal performance, VM encryption allows for the protection of data within virtual machines, and Fault tolerance provides continuous availability by allowing a secondary VM to take over in case of failure. However, the nature of vMotion's operation contradicts the security premises established by SGX, making it incompatible.