In vCenter Server Identity Provider Federation, vCenter Server uses the OpenID Connect (OIDC) protocol to receive an identity token that authenticates the user with vCenter Server." Integrated Windows Authentication is deprecated since vSphere 7.0 https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.authentication.doc/GUID-157188E3-531C-4CC2-BDD4-8BF01EA26BDC.html