How to change the default font in Microsoft Outlook from 'Calibri' to one you prefer more

To change the font in Outlook, head to the "Signatures and Stationery" menu, where you can pick from a number of fonts.

How to attach a folder in Microsoft Outlook and send multiple files at once

You can attach a folder to an email in Microsoft Outlook to send several files all at once by compressing the folder into a zip file.