Yesterday Microsoft released a new application in the Apple and Android stores: "Outlook for iOS" and "Microsoft Outlook Preview". At this time, we STRONGLY advise you NOT to use this application! We have already blocked it on our Mailservers.
This application does not directly connect to the Uni Basel mail server. Instead, it routes your entire mail traffic over a group of proxy servers in the USA. This means that your login information (username & password) as well as other mail data are stored on these proxy servers. This action is described in the application's privacy guidelines, but they failed to explicitly inform you of this when you are configuring your mail account.