Office 365 tenant to tenant migration refers to the process of moving data, applications, users, and other resources from one Office 365 tenant (also known as a subscription or organization) to another. This migration might be necessary due to various scenarios, such as company mergers, acquisitions, divestitures, or rebranding. Tenant-to-tenant migration can be complex but is achievable with careful planning and proper execution.
Here's a breakdown of what's involved in an Office 365 tenant-to-tenant migration:
Assessment and Planning:
Understand the scope of the migration, including the number of users, types of data (email, documents, etc.), applications, and services that need to be migrated.
Identify key stakeholders and create a migration team.
Develop a comprehensive migration plan, outlining the strategy, timeline, and communication strategy.
Preparation:
Set up the target (destination) tenant with necessary configurations, licenses, and security settings.
Verify compatibility between applications and services in the source and target tenants.
Decide on the user identity strategy, whether to retain existing identities or issue new ones.
Data Migration:
Migrate data from the source tenant to the target tenant, including email, calendars, contacts, SharePoint sites, OneDrive for Business data, and more.
Utilize migration tools or third-party solutions designed to handle different types of data.
Application Migration:
Migrate or reconfigure applications and services that were integrated with the source tenant to ensure they work in the target tenant environment.
User and Group Migration:
Provision user accounts in the target tenant, assign licenses, and configure permissions.
Migrate security groups, distribution lists, and other group memberships.
Set up appropriate permissions and access settings for users and groups.
Domain Configuration:
Update DNS records to point to the services in the target tenant, such as mail and SharePoint sites.
Configure domain settings in the target tenant to ensure proper email delivery and access.
Communication and Training:
Communicate the migration plan to users, informing them of the upcoming changes and any actions they need to take.
Provide training and resources to help users adapt to the new tenant and its services.
Testing:
Conduct thorough testing of migrated data, applications, and services to ensure they function as expected in the target tenant.
Cutover and Post-Migration Tasks:
Execute the cutover phase, completing the migration and transitioning users to the target tenant.
Monitor user feedback and address any issues or questions that arise after the migration.
Update documentation and guidelines for users in the new tenant.
Tenant-to-tenant migrations can be complex and require expertise in both source and target Office 365 environments. Due to the intricacies involved, consider partnering with IT professionals or consulting services experienced in tenant-to-tenant migrations to ensure a smooth transition with minimal disruptions.
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