Are you paying for Microsoft 365 licenses that you don’t actually need? In this video I break down a mistake I see all the time: admins creating a brand-new user mailbox every time the business needs a generic address like sales@ or info@. The reality is simple—Microsoft 365 gives you multiple ways to create email addresses, and not all of them are mailboxes. An email address is tied to an object in Exchange or Entra ID, and that object determines if it has a mailbox, if it can be accessed by multiple people, and if it needs a license. I walk you through nine different email types and when to use each one: user mailboxes for employees who need to log in, aliases for extra addresses that land in one person’s inbox, and shared mailboxes for team inboxes (usually without a license up to 50 GB). I also cover distribution lists for announcements, Microsoft 365 Groups for modern collaboration (email + calendar + SharePoint + Teams), resource mailboxes for rooms/equipment, mail-enabled security groups, external mail contacts, and even a catch-all rule for temporary migration scenarios. My goal is to help you design a clean, cost-effective email structure from day one—so your tenant stays organized and easy to manage.