This document discusses best practices for deploying Office 365. It recommends identifying a pilot group and considering workloads like OneDrive for Business or Office 365 ProPlus to get started. It warns against common mistakes like excluding important groups from planning or lack of understanding of product functionality. The document also discusses identity and authentication as first steps, specifically leveraging existing directories to reduce management overhead and providing single sign-on without new passwords. It highlights Centrify Identity Service as a solution that simplifies and secures Office 365 deployment through automated provisioning, mobile management, multifactor authentication policies and support for thousands of applications through single sign-on.