option to Disable Excel Online (lack of functionality)
Please provide the option to completely disable Online Excel (in particular), Online Word and Online PowerPoint. Online Excel is missing too much functionality - 99 out of 100 spreadsheets which I work on have features which are not supported by Online Excel. It is frustrating to have to wait for documents to open in Online and then to wait again for Excel to open them. (Online Excel is slower to open than Excel).