All portal properties in Liferay Portal 6.2 that are also used in Liferay DXP 7.1 can be overridden. Portal property and portal event action hooks that use these properties can be upgraded by following these steps:
Adapt your code to Liferay DXP 7.1’s API using the Liferay Upgrade Planner. When you ran the planner’s Fix Upgrade Problems step, many of the existing issues were autocorrected or flagged. For any remaining errors, consult the Resolving a Plugin’s Dependencies article.
Deploy your hook plugin.
Liferay DXP’s Plugin Compatibility Layer converts the plugin WAR to a Web Application Bundle (WAB) and installs it to Liferay’s OSGi Runtime.
Your custom property values and actions are live.
Resolving a Plugin’s Dependencies