The title of this white paper notwithstanding, Osterman Research wants to make it clear at the outset that we believe Microsoft Office 365 to be a robust and capable platform, one that will serve most organisations well. If your organisation is using Office 365, we recommend you continue to do so. If you’re not using it, we recommend you consider it. Microsoft offers a large, varied, and growing number of features and functions in Office 365, and at a wide range of price points that will satisfy a number of different markets.

That said, decision-makers evaluating the efficacy of Office 365 to meet their
business requirements must be aware of its shortcomings in the areas of data
protection, archiving, security, encryption, authentication, and eDiscovery (among
others) covering workloads like Exchange Online, SharePoint Online, OneDrive for
Business, Skype for Business, and Azure Active Directory. An awareness of these
shortcomings enable decision-makers to plan for the mitigations required to assure
the proper business performance of Office 365.