While the vSphere Client 6.0 (the traditional "C#" or "thick" client) is a legacy tool, it remains essential for managing older ESXi hosts or specific legacy configurations. Following the transition of VMware products to Broadcom, finding direct download links has changed. Official Download Methods
root credentials for ESXi or administrator@vs.local (or your domain admin) for vCenter.Key Features of vSphere Client 6.0
The C# Windows client is highly regarded for its speed and responsiveness compared to the early vSphere Web Client [25]. However, VMware admins noted that it was increasingly "legacy" by 6.0, as it lacked support for newer features (like Virtual SAN or advanced VM settings) which were only available in the Web Client [25, 33]. It remains useful for "Plan B" scenarios or managing older hardware that cannot run newer ESXi versions [25]. vsphere client 6.0 download link