1 person found this helpful
Free esxi doesn't have VADP feature. You have to buy any vsphere editions to use backup software.
Alternative method is using vghetto backup script from Willam Lam GitHub - lamw/ghettoVCB: ghettoVCB
That's true. As mentioned above, Veeam doesn't support unlicensed (free) ESXi because it has required VMware APIs disabled.
Alternatively you can use Free Windows Backup for Endpoints, Servers, Desktops - Veeam Agent for Windows