vSphere web Services
vSphere web Services must be operational for the Volume Shadow Copy Service and Virtual Disk Service to work properly in the guest Windows Server. By default, vSphere web Services are on as ESX/ESXi OS loaded.
To check if vSphere web Services are online, use a web browser to access https://189.0.0.222/mob
A prompt appears for the user credentials to log in the hosted web services. The “189.0.0.222” is an example of an ESX(i) server or a vCenter Server IP address.