You can bring Email, Calendaring, and Chat/Videoconference into Zimbra for Enterprise-Level Collaboration
Zimbra Collaboration is that the world’s leading open supply electronic messaging and collaboration resolution, trusty by quite five,000 corporations and public sector customers, and 100s of countless finish users, in over 140 countries.
They include complete email, contacts, calendar, file sharing, tasks and messaging/videoconferencing, all accessed from the Zimbra net shopper via any device. you'll deploy Zimbra as a standard on-prem install or through a Zimbra hosting supplier.