upgrading from much older version to v9

[johnsmith]

What is the easiest way to upgrade from version 5.xx to version 9?

[victor]

A simple but paid way is to find a developer/customizer who will do it for you. Or contact EspoCRM technical support for paid support with a similar request.

If you do it yourself, you need to have several environments with php + mysql or php + mariadb. The environments will have to be changed from version to version. A possible option to do this is to use Docker Compose: https://docs.espocrm.com/administrat...docker-compose.