I've installed the Boxcryptor iOs app and am able to preview encrypted files on my device. I am unable, however, to edit these files in the respective apps. For example, I cannot edit an Excel spreadsheet in the the Excel app or a Word document in the Word app. The apps want me to "sign in" to Microsoft's Office 365 service. I am able to open and edit unencrypted Dropbox files in these apps, presumably because the Excel and Word apps are connected to Dropbox.
Is it possible to connect Boxcryptor to these apps so I can edit the Excel and Word documents?
Perhaps a better question: how do I edit encrypted Word and Excel files on the iOs?
I'm sorry if this question is basic: I've explored all over the web trying to locate an answer.