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To access the configuration UI of the add-on, navigate to <confluence_url>/plugins/servlet/plantumlcloud/admin.Image Removed

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Using your own PlantUML server allows you to have to setup the backend only once in case of a DC.

Docker

You can run the official docker image using command like below:

docker run -d -p 8080:8080 plantuml/plantuml-server:jetty

This makes the PlantUML backend available on http://localhost:8080 which what you need to point the add-on to.