#microsoft 365, #Office 365, #migration
Exchange Online Tenant-to-Tenant migration is the process of moving email data from one Office 365 tenant to another. This can be necessary if an organization merges with another company or if a company splits into multiple entities, and each entity needs its own Office 365 tenant.
This article is part of a series. Check out our full Microsoft 365 tenant-to-tenant migration Guide
Exchange Online Tenant-to-Tenant migration involves exporting mailbox data from the source tenant and importing it into the destination tenant. There are several methods for performing this migration, including using third-party tools or Microsoft's native migration tools.
It is important to plan and prepare for the migration, as there are many factors that can impact the success of the migration, such as the size of the mailbox data, the number of mailboxes to be migrated, the network bandwidth available, and the level of user disruption that can be tolerated. Proper planning, testing, and execution of the migration can help ensure a successful transition to the new tenant with minimal downtime and data loss.
Before you begin an Exchange Online Tenant-to-Tenant migration, there are several prerequisites that one needs to be aware of:
Step 1. Plan the migration
Step 2. Prepare the source and destination tenants
Step 3. Prepare the migration tools and the data for migration
Step 4. Perform the migration
Step 5. Post-migration tasks
The Exchange Online Tenant-to-Tenant migration process can be complex, but following these steps and properly planning and preparing for the migration can help ensure a successful transition to the new tenant.
Learn more about the migration services we provide:
Office 365 Tenant-to-Tenant Cutover Email Migration if your company needs to migrate User or Shared mailboxes, Transport rules, Contacts and EOP settings.
Tenant to tenant In-Place Archive Migration if it is necessary to migrate archives.
Azure AD Tenant-to-Tenant Basic Transition if your company needs help with the transition of Distribution Lists.
MX Spooler Service to avoid NDRs and bounced emails to help you migrate MX spooler.
Exchange Online tenant-to-tenant (T2T) migration can be a complex and challenging process, here are some common challenges and issues to keep in mind:
Domain Name System (DNS) Changes. When moving to a new Tenant, all DNS records need to be updated, including MX records, Autodiscover records, and other important records that are associated with email delivery.
Tenant Setup. The new Tenant needs to be configured with the correct settings, such as retention policies, archiving settings, and other configurations that match the existing Tenant.
Permissions and Access. Permissions and access levels need to be reviewed and configured for each user account, ensuring that users have the appropriate level of access to the resources they need.
Third-Party Integration. If the existing Tenant is integrated with third-party applications or services, these integrations need to be reconfigured to work with the new Tenant.
Public Folders. If there are public folders in the existing Tenant, these need to be migrated to the new Tenant, which can be a complex and time-consuming process.
Customizations and Add-Ons. Any customizations or add-ons that were installed on the existing Tenant need to be reinstalled and configured on the new Tenant.
Testing and Verification. Once the migration is complete, it is essential to thoroughly test and verify that all email is being delivered correctly and that users have the appropriate access to resources.
Downtime. Depending on the complexity of the migration and the number of users involved, there may be some downtime associated with the migration. This downtime needs to be minimized as much as possible to avoid disruption to business operations.
Data Loss. During the migration process, there is always the risk of data loss or corruption. It is essential to have a comprehensive backup and recovery plan in place to minimize the risk of data loss.
In summary, tenant-to-tenant migration can be a complex and challenging process, but with careful planning and execution, it is possible to minimize the impact on users and ensure a successful migration. It is essential to understand the common challenges and issues associated with T2T migration and take steps to mitigate them.
Learn more about other types of services that almost always require data migration:
2023-07-04