Microsoft stupidly named two different things as 'Outlook'. The first one was (and remains) the standalone email client which most businesses (and many individuals) use to access their emails. (i.e. it has absolutely nothing to do with their web browser). The more recent one is the Outlook.com website, accessed through a web browser, through which Hotmail addresses can be accessed.
So, before we waste your time giving you advice about the wrong 'Outlook', please let us know which one you're referring to. (i.e. are you using the Outlook email client, which has nothing todo with your web browser or are you using your web browser and going to the Outlook website?)