After you create a new ESX user account for the VMwareDisks agent to communicate with an ESX host, you can optionally integrate the account with any existing Active Directory authentication in your environment. Else, the new ESX user account depends on the local authentication mechanism on the ESX host, and you will need to configure one account per host.
Integrating with an existing Active Directory mechanism helps you leverage the same ESX user account across multiple ESX hosts for VMwareDisks agent configurations.
To integrate with Active Directory
If the Directory Service Type is not Active Directory, in the top right corner, click Properties.
Alternatively, configure vSphere Authentication proxy.