You can do plenty of things on Outlook, including some you probably didn’t even know about. But every user will encounter the most common Outlook problems sooner or later since no app is perfect. The ...

To change the default browser in Outlook 365, go to File > Options > Advanced, then scroll to “Link Handling” and set “Open hyperlinks from Outlook in” to your preferred browser, like Chrome.

Some users reported that every time they open the classic Outlook app on their computer systems, the Outlook (new) app opens in place of it automatically. Maybe you had made the switch by mistake..