The below is a description of the accounts created on an ESXi host when deployed with VCF.

root – Administrator
Super user / Administrator

lldpVim-user – ESXi User
NSX user inventory discovery agent

svc-vcf-esxihostfqnd – ESXi User
SDDC management and bringup of esxi host

nsx-user – ESXi User (There isn’t an option today to manually manage these passwords.)
automatically created on an ESXi host when NSX-T VIBs are installed and therefore prepared as a transport node
This user is used for nsx-opsagent to invoke VIM API calls to the hostd agent on the ESX specifically for Layer 2 configuration (create / update of hostswitch configuration, port configuration, etc).

da-user – ESXi User ( There isn’t an option today to manually manage these passwords.)
automatically created on an ESXi host when NSX-T VIBs are installed and therefore prepared as a transport node
This user is used to collect inventory of ESX (VMs, NICs, etc).

mux_user – ESXi User (There isn’t an option today to manually manage these passwords.)
automatically created on an ESXi host when NSX-T VIBs are installed and therefore prepared as a transport node
This user is used for reading/writing into namespace db. For that purpose permission to Host.Local.ReconfigVM is provided for the user.

dcui – DCUI User
This user’s primary purpose is to configure hosts for lockdown mode from the Direct Console User Interface (DCUI).

vpxuser – VMware VirtualCenter administration account
The vpxuser permission is used for vCenter Server when managing activities for the host.

By Kader