Opening Excel file from other app should not be read only
When I open an Excel file into the Excel app from an email, I want to be able to edit it before deciding whether to save it or not. Excel always open files from other apps as read only, so I have to make a local or cloud copy to do anything. This is annoying as it will take up space with Excel files that I may never use again.
Another example, is that I may want to open an Excel file from an email, make a few edits and email it back without saving it locally.
Please use the behavior expected in the Windows application in the iOS apps as well. If I open an Office file from an email in Windows, I can edit the file in the Office app, without being asked to save it first. I expect that behavior in iOS as well.
For example, if I do not want to change an Excel, I often want to freeze panes just for viewing convenience when I open someone else's Excel file from an email. It is inconvenent if I have to save the file first and it forced me to delete the local copy later on.