VxRail Manager orchestrates the life cycle management of the VxRail-supplied vCenter Server.
The customer is responsible for life cycle management of the customer-supplied vCenter. Per VMware best practices, the vCenter instance is upgraded before performing life cycle management on a VxRail cluster. Follow the guidance in the VxRail release notes to identify the supported vCenter version based on the target VxRail version. See Overview of the vSphere Process for best practice order for upgrades.