Outlook

- Open Outlook.
 
- Click on the group you would like to edit.
 
- Click Group Settings > Edit Group.
 
- Here you can edit Group Name, Privacy, Language, Add/Remove members, and Edit Permissions.
Click OK, when finished. 

 
Outlook Web App (OWA)

- Sign into Commons.
 
- Click the Mail icon, at the top of the page.
 
- Click the Group you would like to edit.
 
- Click Private Group.
 
- About: Edit Description, Privacy, and Language.
 
Members: Add and Remove, or edit Roles.

 
 
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Office 365 - Create Group