Hi,
Via https://support.microsoft.com/office/create-a-group-in-outlook-04d0c9cf-6864-423c-a380-4fa858f27102
- Open new Outlook.
- There are two ways to find your groups:
- Select Groups in the App bar located in the left of the window.
- In the mailbox folder list, select Go to Groups
- Select New Group on the ribbon and in the drop down select New Group.
- Enter the Name, Description, and set the Privacy settings, and then select Create. Tip: When creating a group you'll need to decide if you want it to be a private group or a public group. Content in a public group can be seen by anybody in your organization, and anybody in your organization can join the group. Content in a private group must be seen by the members of the group and people who want to join a private group have to be approved by a group owner.
Add members to a group in new Outlook
You'll be prompted to add members when you first create a group, but you can also add them later.
When you've entered the names or email addresses of everyone you want to add, select Add. If you're not ready to add people to your group, select Not now.
Note: If you don't see Groups in the left pane, your organization may not have turned on Groups.
I hope this information helps. If you have any more questions, don't hesitate to reach out.
Otherwise, please take a moment to rate the answer. Wishing you good luck!