Microsoft Office 365 provides various software solutions such as SharePoint, Microsoft Dynamics and OneDrive for document management that have unique perks based on their application and your needs. However, each offers you;
Easy access to the information you want
Ideal for mobile devices: You create, edit, collaborate anytime anywhere
Overall security: More secure than an internal server
File and folder level security: Give access to only the people who really need it
Compliant
Version control so that there aren't multiple copies of an item floating around
And much more.