eSHARE's Office integration enables in-browser editing for standard Microsoft Office formats, including Word (.docx), Excel (.xlsx), and PowerPoint (.pptx). PDFs are partially supported, with view functionality available but limited editing capabilities like filling a pdf, signing, commenting, etc.
Editing CSV / TXT files is currently not available through Microsoft Online within a Trusted Share. Converting to .xlsx is one workaround to allowing collaboration for these file types.