Explanation:

You can use Office 365 ProPlus with supported versions of Exchange Server or SharePoint Server that are installed on-premises in your organization. Or, if they're part of your Office
365 plan, you can use Office 365 ProPlus with Exchange Online and SharePoint Online.
Users can store the files they create with Office 365 ProPlus on their local computers or elsewhere on your network, such as a SharePoint site. Office 365 also provides cloud- based file storage options.
FastTrack Specialists provide guidance on steps for data migration to Office 365. We provide guidance for you by using a combination of tools and documentation and by performing configuration tasks where applicable and feasible. This is available for all eligible customers with Office 365 services for Exchange Online, OneDrive for Business, and SharePoint Online.
References:
https://support.office.com/en-us/article/About-Office-365-ProPlus-in-the-enterprise-
9f11214c-911d-4e3c-9993-a566f12b1a68
https://technet.microsoft.com/en-us/library/mt651702.aspx