Migrating content to SharePoint Online, whether you do so from local file shares, third-party file hosting services, SharePoint Server infrastructure, or even from another SharePoint Online tenant, requires a thoughtful approach. To successfully complete a SharePoint Online migration, you must undergo several steps, including the following:

• Determining and inventorying data sources
• Evaluating the migration process and tools
• Gathering data permissions and assessing the requirements
• Planning the destination site architecture and security
• Evaluating the network requirements
• Preparing data sources
• Change management

Each of these steps is important in ensuring data or applications aren't overlooked and that you have allocated adequate resources to the effort. Communication throughout the change management process is critical to driving the adoption...