templatesvmware-esxivmware-vsphere
In the esx 6.7 version, there is no template creation option.
I tried this link, but no options available as shown.
This is for creating templates, these options also not visible. Please suggest. FYI, I am using the root account and it is a licensed version.
With a combination of powercli and the vmware sdk (you need to native mount the vmdk to a windows server). If I remember correctly the sdk has a windows based vmdk mount tools so via powercli mount the disk then you run DISM against this offline vm, dism allows offline updating.. Not a trivial task but it can be done. I did this many years ago so I don't remember all the details. So I'd google dism offline line update and vmware sdk mount vmdk this should give you enough of what you'll need to cover this.
I would simply recommend maintaining two separate clusters and handling replication at the virtual machine level with the vSphere Replication product. This is available to you with your vSphere Essentials Plus license and allows you to maintain an RPO between 15 minutes and 24 hours (adjustable per-VM), as well as the ability to replicate to dissimilar datastore types. vSphere Replication is a component used in VMware's larger Site Recovery Manager disaster recovery suite.
I use the replication to handle offsite protection of some critical virtual machines. The newest revision of the software allows you to keep point-in-time snapshots at the destination.
Best Answer
The documentation you are linking to is for VMware vSphere, not VMware ESXi.
The ESXi server does not have the concept of templates, licensed or not. You have to use vSphere vCenter to create and use VM templates.