Thanks for all the feedback here. The team is actively working on this for OneDrive for Business, and the capability will begin rolling out shortly. More to come soon!
An error occurred while saving the commentChris commented
Auto correct and spell check do not work efficiently, this is a very basic function that adds time to every email - very frustrating not to feature in the web version of Outlook 365.
It is also very frustrating that you cannot search alphabetically within files, instead you have to scroll down until you find the right file.