How to upgrade community version to enterprise version

how to upgrade community version to enterprise version?
let me know how to resolve below issues

Hello @kyaw_swar_hein,

To upgrade to an enterprise edition, you first have to buy a subscription: OpenNebula Subscriptions | Open Source Cloud & Edge Computing Platform

Then follow the steps that you can find on the documentation:

Or
https://docs.opennebula.io/6.8/intro_release_notes/upgrades/overview.html

If you are using it for non-commercial reasons, please fill the form that appears linked on the last link I’ve shared here.

Regards,

Thanks for your support and help in case.
However, Now we are using Community version 6.6 and we would like to upgrade Enterprise version 8.8.
We tested upgrade process the fact that we face some of issue.

If you have an Enterprise Edition token you just need to update your repositories to point your package manage to the enterprise repository. With the enterprise repository you automatically get the migrator during the upgrade process.

The upgrade process is documented here. You can also take a look at this Knowledge Base Article that describes the process in a possible easier to read format.