The vSAN witness appliance includes two preconfigured network adapters. You must change the configuration of the second adapter so that the appliance can connect to the vSAN network.
- In the vSphere Web Client, navigate to the virtual appliance that contains the witness host.
- Right-click the appliance and select Edit Settings.
- On the Virtual Hardware tab, expand the second Network adapter.
- From the drop-down menu, select the vSAN port group and click OK.