Use a contact group to send an email to multiple people without having to add each name to the To, Cc, or Bcc line individually.
For the most current information on creating a contact group in Outlook, please reference the following Microsoft help article:
https://support.microsoft.com/en-us/office/create-a-contact-group-or-distribution-list-in-outlook-for-pc-88ff6c60-0a1d-4b54-8c9d-9e1a71bc3023