SERVER | DATACENTER 3.18.0-ENTERPRISE (OR HIGHER)
In order to migrate your BPMN Modeler Free / Enterprise diagrams to a Confluence Cloud instance, please follow these steps:
Install the latest version of BPMN Modeler Enterprise (>= 3.18.0-ENTERPRISE)
In case you are using the BPMN Modeler Free, get the free trail version at no cost (https://marketplace.atlassian.com/apps/1219284/bpmn-modeler-enterprise?tab=overview&hosting=server )
As Confluence administrator, perform the Upgrade procedure to make sure all of your diagrams are upgraded to Enterprise, as described here: Features for Confluence Admins
We recommend doing this even if you are already using BPMN Modeler Enterprise. Maybe some old FREE diagrams are hiding somewhere from earlier days!
Verfiy that there do not exist any more FREE diagrams in your Confluence by performing the Analysis again
Done. You may now continue to migrate your pages to Confluence Cloud. All ENTERPRISE diagrams (page macros) will be recognized seamlessly after installing the BPMN Modeler Enterprise Cloud app.