When you are thinking of migrating to SharePoint Online (Office 365) from either file share, SharePoint 2007 or SharePoint 2010 there are couple of things you should consider. When it comes to Office 365 you are not just stuck with SharePoint sites. You can also use Office 365 Groups for your collaboration or document work-space. With proper security, users can create their own groups and start collaborating. Groups is bit different then transitional SharePoint team sites. An Office 365 group can be public or private and you can use it based on your use case. You can read all about it here.
Some of the key points about Office 365 groups are
- A group has its own mailbox so all group emails are easy to locate and manage. In Outlook Web App, you can also have a conversation with group members by posting and replying to short messages.
- A dedicated group calendar helps all members coordinate their schedules. Everyone in the group automatically sees meeting invites and other events.
- Sharing content, such as files and folders, is a hallmark of group collaboration. Shared content can live elsewhere in Office 365, but One-drive for Business makes it convenient to view and edit files regardless of the actual location.