On the right select "Create Template Image" > Ok the warning (you would need to create a snapshot in the VMware console at the same time)
Enter the Template Name
Select "All files" or "New and modified files" inventory
Clone Cleanup > Select Manual or Automatic
Internal Template: keep defaults
Internal Template: Standard
Check the box if Clones are joined to an Active Directory domain
Suffix: leave blank
Which characters may exist between the prefix and suffix?
Check the box for "Numbers (0-9)" only
Horizon's default Internal Template name pattern looks like "it1234567", it is very uncommon that this was changed
App Control capitalizes the Internal Template name from "it123567" to "IT1234567"
Internal Template Tests: this is only used to verify that the Instant Clone VM names don't accidentally match the Internal Template name since this will cause the App C clone process to fail
For example if the Instant Clones are named as "IT1,IT2..." this will match the pattern of the Internal Template name "IT1234567" and the test will fail
To pass the test enter a sample Internal Template name and a sample Instant Clone VM name eg.