If you logged on to check your email yesterday ... The initial Outlook issues were first experienced in Microsoft's New Outlook desktop app which replaces the previous web app.

If you're a frequent Outlook ... the web app but not on your desktop app. If you do remove them from the desktop app, note that they will also be removed from Outlook.com. If the buggy email ...

In general, email ... Outlook, as well as the Mail application that comes with Windows. To create new ones though, you’ll need to follow these steps in your web browser, not the desktop app.