This scenario exposes the dirty secret of enterprise IT: vSphere 5.5 end-of-life was September 2018. Keeping it alive today is a risk that requires air-gapping or strict network isolation. Managing it from Windows 11 is an exercise in masochism.
Avoid downloading the installer from unofficial file-sharing sites or forums. These files frequently bundle malware, spyware, or altered binaries that pose severe risks to your management network. Step 2: Preparing Windows 11 for Installation vsphere client 5.5 download for windows 11
Because VMware no longer provides security patches or bug fixes for this version, using it on a modern Windows 11 machine exposes your environment to unpatched vulnerabilities. How to Download and Install This scenario exposes the dirty secret of enterprise