The source and target environments must be properly prepared before starting any migration activities. Environment Preparation Checklist of this document contains a checklist of the tasks to prepare the environments.
Overview of Migration Scenarios
Step 1. Establish Directory Synchronization (Optional)
Step 3. Process Distributed Resources
Step 4. Move End-user Workstations and Servers to the Target Domain
Step 5. Process BackOffice Servers
Step 6. Move BackOffice Servers to the Target Domain
Step 7. Stop Directory Synchronization (Optional)
Step 8. Disable Source Accounts
Step 10. Clean Up SIDHistory Attributes
Step 11. Clean Up Legacy Account Permissions
Step 12. Clean Up Service Attributes Used for Migration
Step 13. Decommission the Migrated Environments
Step 1. Establish Directory Synchronization
Step 2. Start Public Folder and Calendar Synchronization
Step 3. Establish Free/Busy Synchronization (Optional)
Step 4. Synchronize Mailbox Data
Step 5. Switch to the New Exchange Mailboxes
Step 6. Update Outlook Profiles
Step 7. Change the Mail Exchanger or Alias Records
Step 8. Stop and Uninstall the Synchronization Agents
Step 9. Clean Up the Additional SMTP Addresses and Service Attributes Used for Migration
Step 10. Decommission the Migrated Environments
Active Directory and Exchange Migration
Parallel Active Directory and Exchange Migration
Exchange First, Then Active Directory Migration
Since most lab environments are not true mirror images of production, there may be some differences in behavior when you start migration in production. Therefore, the best practice is to begin your migration with a pilot migration: select a pilot group of accounts that includes a wide spectrum of groups, users, and service accounts, and migrate that group first. This limits the user impact if unexpected issues occur. Do not limit the pilot to just IT or the migration project team members because they generally have modified configurations and won’t represent a good cross-section of your users.
During the pilot migration, follow the procedures in the cookbook you prepared during the planning stage. If no problems occur, you can start migrating the rest of the environment. However, if a problem should arise, you should resolve it first, perform additional testing, update the cookbook to include the correct procedures, and then repeat the pilot.
Migration Manager allows you to migrate multiple Active Directory domains and Exchange organizations at a time. Three basic migration scenarios are supported by Migration Manager:
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