Note: An XHTML export enables you to download all data of projects where you are the owner.
When creating an XHTML export, both ELN data and raw data will be exported, to create an offline archive of all your data. If you are an admin and want to export all data of your group please make sure that you are the project owner of all projects you want to export. You can check this via Manage > Projects.
The export will allow offline access to your data. This is very convenient as it means that you don't have to have internet access to view your data.