Create distribution groups in the Microsoft 365 admin center

Use distribution lists (sometimes called distribution groups) when you want to send email to group of people without having to type each individual recipient's name. Distribution lists can be organized by a particular discussion subject (such as "Marketing") or by users who share common work that requires them to communicate frequently. They also provide a way for you to automatically forward email to multiple email addresses.

1. Select Teams and groups > Active teams and groups > Distribution lists.

2. Select Add a distribution list.

3. On the Set up the basics page, enter a name, description, and select Next.

4. On the Assign owners page, select Assign owners and select a user and choose Add. Select Next.

5. On the Edit settings page, create a group email address for your new group, and choose whether you want people outside your organization to send email to the group. Select Next.

6. On the Review and finish adding group page, verify your group information and select Create group.
   
   To add users to your distribution group, see Add a user or contact to an Office 365 distribution group.

Check out how to use group in Outlook 2016 and Outlook on the web in the Use contact groups (formerly distribution lists) in Outlook topic.

Check out Distribution group issues for help with distribution group issues.