We currently have a single server running ESXi 5.5.0 1331820 with Live VMs and would like to upgrade the license to 6.5 Essentials so that we can use Altaro VM Backup since this does not work with the current free version.
Are there any migration paths which we can take without shutting down the ESXi and off course without re-installing the ESXi from the start since this is the only physical server we have?
Thanks in advance.