Migrate Company to New Microsoft 365 Tenant: Best Practices for 2026
-
Written By
Aradhya Jain -
Approved By
Shivam Rathore -
Updated on
August 10th, 2026 - Read Time
8 minutes
User Query: Our company is planning to transfer from our existing Microsoft 365 tenant to a new tenant because of a merger, business restructuring, or domain change. We have hundreds of user mailboxes, OneDrive files, SharePoint sites, contacts, and calendars. How can we transfer Company to New Microsoft Tenant without losing important business data and mailbox structure?
Introduction: Microsoft 365 has become the primary productivity platform for businesses of all sizes. Companies use Exchange Online for email communication, OneDrive for personal file storage, and SharePoint for collaboration for internal communication. However, migrate Company to New Microsoft 365 Tenant requires transferring data from one tenant account to another. This guide explains the manual method and a professional DRS Softech Office 365 Tenant to Tenant Migration Tool.
Why Do Companies Migrate from One Microsoft 365 Tenant to Another?
- Business Separation or Tenant Split: Sometimes organizations divide into separate business units.
- Changing Microsoft 365 Service Provider: Many businesses start with Microsoft 365 through a reseller or managed service provider.
- Domain Migration: Companies changing their brand identity.
- Merger or Acquisition: When two companies combine.
What Data Can Be Migrated Between Microsoft 365 Tenants?
- Exchange Online Mailboxes: User mailboxes, Emails, Calendar items, contacts, tasks, Mailbox folders, and Shared mailboxes.
- OneDrive for Business Data: Documents, Personal files, Folder structures, and File versions (depending on migration method).
- SharePoint Online Sites: Documents, personal files, folder structures, and supported file versions depending on the migration approach.
Microsoft 365 Tenant Checklist Before Migration
- The analysis should begin with examining the source tenant for user mailboxes, OneDrive accounts, SharePoint sites, Teams data, licenses, and storage needs.
- Further, you will have to prepare the target M365 tenant by creating user accounts, licenses, domain verification, and configuring necessary services.
- Additionally, you will need to develop a user map so that all the emails, files, and other business information can be moved to the right users.
- It is critical to perform the backup and verify DNS settings for secure email transfer.
How to Migrate Company to New Microsoft 365 Tenant Manually?
The tenant-to-tenant migration procedure for Microsoft 365 manually entails the use of the Exchange Admin Center and PowerShell cmdlets to migrate mailbox data from the source tenant to the target tenant. To migrate Exchange Mailboxes, follow this procedure:
- Firstly, verify the domain in the destination Microsoft 365 tenant and complete the required configuration.
- Prepare source mailboxes by checking user accounts, assigning required permissions, and mailboxes are ready for migration.
- Create a migration endpoint in Exchange Online to establish a connection between the source and destination tenants.
- Create and start the migration batch from the Exchange Admin Center or PowerShell.
Alternative Manual Method to Transfer Company to New Microsoft Tenant
For smaller organizations that have fewer users, PST export/import is an option for moving mailbox data across different Microsoft 365 tenancies. In this case, data is exported from one tenant to PST files before importing it into another Microsoft 365 tenant account.
- Export the tenant mailbox into a PST file using Outlook.
- In the destination, create a new account for the mailbox.
- Open Outlook and enter new Microsoft 365 account credentials.
- Use the Import/Export Wizard and Map mailbox folders.
- Allow Outlook to synchronize imported data. Check that all the emails, contacts, and attachments are migrated.
Limitations: Manually Move Company to New Office 365 Tenant
- PST Import/Export requires multiple steps to migrate Office 365 data.
- Exchange Online method requires PowerShell or the Admin Centre.
- Might not preserve the original email formatting and structure.
- PST files only migrate the mailbox. SharePoint and OneDrive are not migrated.
- Moreover, time-consuming and has a chance of data loss.
Professional Tool to Migrate Company to New Microsoft 365 Tenant
For organizaion who have multiple users and a large amount of data, use the reliable DRS Softech O365 Tenant to Tenant Migration Tool. It supports the migration of multiple workloads, including Exchange Online mailboxes, OneDrive for Business, and SharePoint Online data. This tool offers Modern Authentication and Admin Impersonation to connect your source account to the destination. Support bulk migration with multiple advanced features, such as Remove Duplicate, Date Filter, and more. Also, a free version of this tool is available to test its features and functions.
How to Migrate a Company to a New Microsoft 365 Tenant?
- Download the tool and select the required module: Mailbox, SharePoint, OneDrive, or Deduplication.
- Authenticate source and destination tenants using Modern Authentication or Admin Impersonation.
- Select data, map source and destination users, and configure migration settings. Start Migration.
Note: For detailed Steps, check the software guide of DRS Softech O365 Tenant to Tenant Migration Tool.
Scenario: MSP Change Required Microsoft 365 Tenant Migration
A growing company wanted to transfer away from its previous Microsoft 365 service provider and manage its environment internally. The organization had years of email communication, shared mailboxes, and business documents stored in the old tenant.
The IT team first reviewed mailbox sizes, user accounts, and collaboration data. They migrated the required workloads to the new tenant using the DRS Softech Tenant to Tenant Migration Tool. The transfer helped the company gain full control over its Microsoft 365 environment while keeping historical business data available.
Conclusion
In this technical blog post, we explored several methods to migrate company to new Microsoft 365 Tenant. Microsoft provides native cross-tenant capabilities for Exchange Online, OneDrive, and SharePoint, but each workload follows a different process. For organization who wants to migrate large amounts of data, use the professional tool. It supports bulk migration with multiple advanced features. You can also download the free version of this tool to test its features and functions.
Frequently Asked Questions
Ans. To migrate a company to a new Microsoft 365 tenant. Microsoft provides separate cross-tenant migration processes for Exchange Online, OneDrive, and SharePoint. For large migrations, a dedicated tenant-to-tenant migration tool can simplify bulk transfers and monitoring.
Ans. Yes, a well-planned Microsoft 365 tenant migration can transfer supported business data with minimal risk of data loss. However, administrators should identify workload limitations, maintain appropriate backups, perform a pilot migration, and validate the destination data before decommissioning the source tenant.
Ans. The result depends on the workload and migration method. Exchange Online migration can transfer supported mailbox content and folders, while OneDrive and SharePoint migration can preserve supported folder structures.
Ans. Microsoft 365 migration processes and third-party migration tools can support modern authentication methods such as OAuth 2.0. For example, the DRS Softech Office 365 Tenant to Tenant Migration Tool supports Modern Authentication for connecting source and destination Microsoft 365 tenants.
Ans. These workloads require separate migration planning because Exchange Online, OneDrive, and SharePoint have different migration processes and limitations. Exchange Online mailboxes, OneDrive files, and SharePoint content can be handled through their respective migration procedures.
Ans. Administrators should compare migration reports with the source inventory and verify mailbox folders, emails, attachments, contacts, calendars, OneDrive files, SharePoint documents, and user mappings. A pilot group should also test access to migrated data before the complete company migration is finalized.
Ans. Yes, administrators can plan a migration involving multiple Microsoft 365 workloads. However, each workload has separate prerequisites and migration procedures. A migration tool can help manage multiple supported workloads from a centralized interface and monitor their progress.
Ans. Microsoft 365 uses security controls to protect data during transmission and storage. When using the DRS Softech tool, administrators should also verify how the tool handles authentication, data transmission, and credentials.
Ans. DRS Softech O365 Tenant to Tenant Migration Tool offers a deduplication option to delete duplicates from Mailbox, SharePoint, and OneDrive as per your needs. Administrators can use this feature to clean up duplicate items before or during the migration process.
Ans. To minimize downtime, prepare the destination tenant in advance, perform a pilot migration, migrate users in batches, and plan the DNS and mail-flow cutover carefully. Validate the migrated data before switching users completely to the new Microsoft 365 tenant.
Ans. Before migration, IT teams should verify user accounts, mailbox sizes, OneDrive and SharePoint data, domains, licenses, permissions, authentication settings, source-to-destination user mapping, DNS records, backup requirements, and workload-specific migration limitations.
