How to add a large group of emails to a new Outlook group?

To add a large group of emails to a new Outlook group or contact group all at once, you can follow these steps:

1. Open Outlook and go to the "People" section.
2. In the toolbar at the top, click on the "Home" tab.
3. Click on the "New Contact Group" button. This will open a new window for creating a contact group.
4. In the contact group window, enter a name for the group in the "Name" field.
5. Click on the "Add Members" button in the toolbar at the top.
6. From the dropdown menu, select "From Address Book". This will open the "Select Members" window.
7. In the "Select Members" window, click on the address book or contacts folder that contains the emails you want to add to the group.
8. Hold down the "Ctrl" key on your keyboard and click on each email address you want to add to the group. This allows you to select multiple email addresses at once.
9. After selecting all the desired email addresses, click on the "Members ->" button to add them to the contact group.
10. Once you have added all the email addresses, click on the "OK" button to close the "Select Members" window.
11. Back in the contact group window, you will see the list of email addresses you added. You can review and modify the names or email addresses if needed.
12. Click on the "Save & Close" button to save the contact group.