excellentexchange

Microsoft Exchange has more usable features of any email package in the world:

Shared calendars:

Lets employees see colleagues' availability to schedule or rearrange meetings, book conference rooms, and plan projects.

Shared task lists:

Allows ‘to do’ lists to be created and assigned, then shared with team members. Managers can check off items as they are completed.

Shared contacts:

Company or shared address books means your customers‘ contact details will never be lost or misplaced.