Mail: Fixed an issue where To, Cc, and Bcc fields in the message composer window in old Outlook are showing scroll bars. Unless otherwise noted, features and fixes listed are for the new Outlook. For more information, refer to our Tech Community blog post. On September 22, 2020, we announced availability of the new Outlook for Mac to Current Channel users beginning in version 16.42. Learn how to install Office for Mac updates, and check out the information below to learn about each Beta release. Outlook for Mac - Release notes for Beta Channel buildsīeta builds for Office for Mac are updated on a regular basis to provide new or improved features, security updates and bug fixes.