Author : william rogers
URL : http:////docs.vmware.com/en/VMware-vSphere/6.7/com.vmware.vsphere.vsan-planning.doc/GUID-05C1737A-5FBA-4AEE-BDB8-3BF5DE569E0A.html
Topic Name : Deploying a vSAN Witness Appliance
Publication Name : vSAN Planning and Deployment
Product/Version : VMware vSphere/6.7
Question :
Is it possible to setup a secondary witness appliance if the current environment witness crashes?
You can have one provisioned and waiting to be put in place, but you can't have it running already. vSAN can only use a single witness appliance.