• Deployment Readiness Tool: Performs pre-migration checks on your Active Directory and environment.
  • Get-ExchangeEnvironmentReport: Creates an awesome HTML report of your legacy Exchange system.
  • Office 365 Speed Test: Tells you how good your connection to Office 365 is and whether you should upgrade your internet before your migration.
  • Exchange Connectivity Test: Many very useful tools for testing external access portions for both Exchange and Office 365.
  • Third-Party Migration Tools by Metalogix, MetaVis, Migration Wiz, Quest and others: Each has its strengths and weaknesses. Microsoft partners extensively with Migration Wiz, but you should evaluate which has the right pricing and features for your needs.