Comments Only in Word?

VasilMichev 
I came accross this as well. I am working in a school environment and would like students only to be able to comment on a certain literary text. I was able to protect the document from changes, but that forces students to open the document in their Word app instead of remaining in the browser. Not all students, however, have installed Word or there are cases, in which students only have a A1 licence. In these cases they would not be able to comment a document online, which is a pitty and because of which I have to move these documents to google docs which allows online commenting of a document. It would be a great addition, if Office365 would enable online commenting (without being able to make changes)!