Outlook

Microsoft allows users to move the navigation bar from the left to the bottom of the screen and change the panes’ width.

Show multiple calendars at once, in an overlay or side-by-side (split) view to assist with managing my calendar, people, or groups calendars

The navigation bar comes with Groups and actions. And, if the groups are not to your liking, you can create or reposition them.

Meeting organizers can automatically delete forwarded calendar event notifications to save storage space and email handling.