How to Upgrade ESXi 6.7 to ESXi 7.0 NT-Virtual Lab 2 years ago How to Upgrade ESXi 6.7 to ESXi 7.0 The Upgrade process will place ESXi hosts into maintenance mode one by one and upgrade the ESXi 6.7 to ESXi 7.0. To remediate individual ESXi hosts, Place the ESXi host into maintenance mode.