MS Exchange server for tasks and calendar, OneNote for notes, SharePoint to sync these notes.
Closed source, expensive, designed to be supported by professionals, you might need more than 1 server/VM to run them all, requires AMD64 processors.
Well tested (used by millions of people every day), relatively secure, not terribly hard to setup (follow installation guide / best practices documents carefully, and you should be fine).
Closed source, expensive, designed to be supported by professionals, you might need more than 1 server/VM to run them all, requires AMD64 processors.
Well tested (used by millions of people every day), relatively secure, not terribly hard to setup (follow installation guide / best practices documents carefully, and you should be fine).