I want to walk through with some explanation and installation of Office 365. If anyone is familiar with Active Directory concept, they can use it easily. At first, I opened an account on Office 365 admin panel and selected a small business plan including 5 users having most of Office 365 products.
As you see, Office 365 is so practical, intuitive, straightforward and useful for companies. It will reduce workload of IT departments. Managing own Active Directory, Exchange Server, SharePoint can be challenge in case of facing with any troubleshoot, migration. It is a good solution from Microsoft.