Create a contact group in Outlook (Microsoft, 2021)
On the Navigation bar, choose People
Select Home > New Contact Group.
In the Contact Group box, type the name for the group.
Select Contact Group > Add Members
, and then select an option:Select From Outlook Contacts.
Select From Address Book.
Select New E-mail Contact.
Add people from your address book or contacts list, and choose OK.
Choose Save & Close.
Send an email to a contact group
Select Home >New Email.
Select To.
In the Search box, type the name of the contact group.
Double-click the name to add it to the To box, and then select OK.