Hi,
For the already customized VM customization is going to work in two main ways:
- if you change any networking configuration (e.g.: connect NIC to a different network on 'none', add/remove NIC, mark some NIC as primary, change "computer name", etc.) - customization will trigger on power-on, but will do only a limited flow (network parameters + "computer name") such that any other changes like password, pre-/post-customization script, join domain, change SID will be ignored.
- you can use "Force customization and power on" menu item (available only in VM menu inside vApp - not in VMs list page), then the full customization flow will trigger once. Basically, you can use this any time you want to run the full flow.
/Andrii