Evaluating Visualforce readiness for Lightning Experience is now done from the Lightning Experience Configuration Converter instead of the Lightning Experience Readiness Check. Use the new Visualforce tab in the Configuration Converter to get a real-time assessment of how ready your existing Visualforce pages are for Lightning Experience. You access the Visualforce readiness report in this tab instead of in a PDF report. This change makes it easier to work with the most current data and take direct action on issues. And now you can prioritize Visualforce pages by profile, which is helpful if you’re rolling out Lightning Experience in phases.
Want to restyle your Visualforce pages so they look like they belong in Lightning Experience? The Configuration Converter makes this a snap with the option to automatically apply Lightning Experience stylesheets to multiple pages.
For more details, and information on how to access the Configuration Converter, see "Prepare Visualforce Pages for Lightning Experience with the Configuration Converter (Beta)"(https://sfdc.co/prep-vf-rn) in the Salesforce Winter ‘19 Release Notes.
