An Embedded OEM license is a license bundled with hardware from an original equipment manufacturer (OEM). It's designed to work seamlessly with that specific hardware and simplifies deployment​.

Yes, Multiple ESXi hosts can be managed by a single vCenter Server license, however, each ESXi host requires a separate vSphere license based on CPU or core count.

Yes, VMware allows transferring a vCenter Server license to new hardware, as long as the license is properly unassigned from the old system and reassigned to the new one​.

One vCenter Server license is valid for managing a single vCenter Server instance. Additional vCenter Server instances require separate licenses