1) Hosted Exchange OVERVIEW -
Hosted Exchange allows businesses of any size to enjoy the business-class email and collaborative functionality offered by Microsoft® Exchange in a pay-as-you-go cloud-based model.
The solution is fully outsourced and the managed Microsoft Exchange environment is hosted in the world class data centre network.
This lets you access your emails, contacts, task lists and documents from anywhere, through any device, as long as you have access to an Internet connection.
2) Exchange Office 365 OVERVIEW -
Work smarter, anywhere: Microsoft Exchange lets you accomplish more with a rich, business-class email experience on phones, tablets, desktops, and the web. Enjoy enterprise email capabilities with bigger and more reliable mailboxes. Experience better collaboration with document sharing. Add enhanced archiving, security, and compliance features.