Unable to edit docs in pro server?

Looking at the forum I see where people say they can edit the documents with only office and under

https://download.seafile.com/published/seafile-manual/deploy_pro/office_documents_preview.MD

It states you can integrate it with libreoffice to edit but I’m not seeing any instructions to?

Currently can preview docs but no option to edit them. Under Office Online Server Integration it only covers preview as well and Office Online.

Instructions to integrate LibreOffice (aka Collabora Office): https://download.seafile.com/published/seafile-manual/deploy/libreoffice_online.md

Instructions to integrate Onlyoffice: https://download.seafile.com/published/seafile-manual/deploy/only_office.md

Instructions to integrate MS Office Online Server: https://download.seafile.com/published/seafile-manual/deploy_pro/office_web_app.md

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