When an organization looks to move to Azure, it's usually not just legacy applications or new greenfield development, but actually, some Enterprise packaged solutions like Exchange, SharePoint, or Dynamics. As we discussed in Chapter 1, Getting Started with Azure, this all starts with Azure Active Directory. With the complications of systems deployed within organizations, there isn't a one size fits all or a magic bullet for migrating to Azure, so I would like to give you some gotchas and pointers on how to get started with migrating your SaaS solutions in Office 365.
Before you start, it is a good idea to have an inventory of all your assets, such as sites, site collections, listed libraries, and the size of your databases.