Best Practices for Merging Dynamics 365 and Microsoft 365 Tenants
Question details
An organization needs to merge two Microsoft 365 tenants and two Dynamics 365 Sales environments into a single tenant and dataset following a company merger.

- Product
- Microsoft 365
- Device & OS
- not provided
- Scenario
- Consolidating organizational IT infrastructure and CRM environments after an organizational merger.
- Observed behavior
- The goal is to successfully combine instances without data loss, addressing gaps in standard tenant migration documentation.
Before initiating a tenant merger, ensure you have Global Admin access to both source and target environments, and perform a comprehensive audit of all users, licenses, custom entities, and relational data.
Follow Power Platform Tenant-to-Tenant Migration Guidelines
Utilize Microsoft's official documentation and consider professional consultation for complex Dynamics 365 data combinations.
Merging Dynamics 365 Sales environments is highly complex because it involves combining relational data, customizations, user security roles, integrations, and licenses. Standard Microsoft 365 mailbox and file migrations do not cover CRM data merging.
Microsoft's native tenant-to-tenant migration moves an entire environment, but merging two distinct datasets into one requires careful planning and specialized data mapping.
Navigate to the official Microsoft Power Platform documentation and read the 'Move environment to another tenant' guide to understand supported migration methods, prerequisites, and limitations.
Because merging two distinct Dynamics 365 datasets into one isn't a native push-button process, consult a qualified Microsoft partner or post in the Dynamics 365 community for specialized migration tools and strategy.
Create a sandbox environment in the target tenant to validate data schemas, test integrations, and ensure custom entities map correctly before migrating production data.

Simplify Document Management with WPS Office After Your Merger
Navigating complex Microsoft 365 tenant migrations can be exhausting and costly. While IT handles the infrastructure consolidation, equip your newly merged teams with WPS Office—a free, lightweight, and highly compatible alternative to Microsoft Office for everyday document tasks.
- 1. Download the Installer: Visit the official WPS Office website and click the 'Free Download' button to get the latest version.
- 2. Install WPS Office: Run the downloaded installer file and follow the simple on-screen instructions to complete the setup.
- 3. Open Your Files: Launch WPS Office and instantly open, edit, and save your existing Microsoft Office documents without format conversion issues.

Frequently Asked Questions
Does Microsoft provide a built-in tool to merge two Dynamics 365 Sales environments?
No. Microsoft provides tools to move an entire environment from one tenant to another, but merging two separate Dynamics 365 datasets into a single dataset requires custom data migration planning, often utilizing third-party tools or partner services.
Can I migrate my Microsoft 365 tenant data along with Dynamics 365?
Yes, but they are handled by different administrative centers. Microsoft 365 migration involves Exchange mailboxes, SharePoint, and Teams, while Dynamics 365 requires Power Platform admin center procedures.
What happens to licenses during a tenant-to-tenant migration?
Licenses are tied to the tenant. You must provision new licenses in the target tenant and assign them to the migrated users before they can access Microsoft 365 or Dynamics 365 services.
How long does a tenant-to-tenant migration typically take?
The duration depends entirely on the volume of data, the complexity of CRM customizations, and user count. A full migration including testing often takes several weeks to months to plan and execute successfully.




