esxi 6.5 M52A5-AU114-58U81-0U3U6-2M5Q5
esxi 7.0 NN20N-6CKD2-H82G1-01126-2XCMJ

https://my.vmware.com/group/vmware/details?productId=742&downloadGroup=ESXI67U1#


https://my.vmware.com/en/group/vmware/evalcenter?p=free-esxi6