
Word online documents opening in edit mode I list them below, although I don't know if they apply to your case. I have found some workarounds, but no firm solution.

If the Preview option is not available in your case, To open a document for viewing, you can right-click on a document from SharePoint Online or OneDrive for Business and click Preview. Now, when you click a Word, Excel or PowerPoint file in OneDrive for Business or open a sharing link to a Word, Excel or PowerPoint file in your browser, you will open directly into edit mode, allowing you to jump into work faster than ever. Coupled with the auto-save option, this canĬause unintended document changes, and also headers and footers don't seem to beĮdit faster in Word, Excel and PowerPoint:

Microsoft changed the default mode to Editing a couple of years ago, and that hasĬaused endless complaints by users.
