Current MS Teams interface only synchronizes documents (and announced soon metadata) from MS Teams to Doxis.
It is also necessary to synchronize documents from Doxis to MS-Teams in order to be able to use MS-Teams functionalities such as simultaneous collaboration and explorer integration for these documents as well.
Otherwise only new documents can be edited/worked on with MS-Teams. However, documents previously archived in Doxis not.
webCube V12.1 is prepared for editing Office documents with Microsoft Office for the Web. This includes co-authoring, so users can start collaboration on documents directly from webCube (which itself can be included in a Teams tab).
It is currently not planned to synchronize content from Doxis into Teams.