Introduction:
EGM Colombia S.A.S., a company operating in Colombia's gold mining and precious metals industry, relied on a shared Microsoft 365 tenant for its day-to-day email communication and collaboration. As the organisation expanded, it needed a dedicated Microsoft 365 tenant to gain full control over user accounts, security policies, licensing, and Microsoft 365 services.
The migration involved more than simply moving mailboxes. The IT team had to ensure that years of business-critical email data were preserved while keeping disruption to users at an absolute minimum. To achieve this, EGM Colombia selected Stellar Migrator for Exchange, which enabled the organisation to securely migrate over 90 Microsoft 365 mailboxes and more than 100 GB of mailbox data to its own Microsoft 365 tenant.
Background:
The migration project was led by EGM Colombia's Technical Support Specialist. Operating within a shared Microsoft 365 tenant limited the organization's control over users, security, licensing, and administration. To improve governance, security, and scalability, EGM Colombia migrated to its own dedicated Microsoft 365 tenant, ensuring all mailboxes and historical email data were transferred with minimal disruption to users.
“ Statement from the customer:
I recommend Stellar Migrator for Exchange for Microsoft 365 tenant-to-tenant migrations. It was easy to use, delivered reliable results, and Stellar's technical support was excellent throughout the project.
”
Impact on the Business:
Moving from a shared Microsoft 365 tenant to a dedicated environment was a significant business and IT initiative.
The organisation depended heavily on Microsoft 365 for internal and external communication, making it essential to complete the migration without disrupting users or compromising mailbox data.
Before beginning the project, the IT team identified three major concerns:
- Preserving complete historical mailbox data throughout the migration.
- Minimising downtime and avoiding disruption to business operations.
- Simplifying what could otherwise become a complex Microsoft 365 tenant-to-tenant migration.
Any unexpected interruption to email services or loss of historical data could have affected employee productivity and daily business operations. Choosing a reliable Microsoft 365 migration solution was therefore critical to the project's success.
Attempted Solutions:
Before selecting Stellar Migrator for Exchange, EGM Colombia evaluated the capabilities required in a Microsoft 365 migration solution.
The organisation needed software that could:
- Preserve complete mailbox history throughout the migration.
- Perform secure Microsoft 365 tenant-to-tenant migration.
- Support batch mailbox migration for efficient project management.
- Automatically map source and destination mailboxes.
- Resume interrupted migration jobs without restarting the entire process.
- Provide clear visibility into migration progress.
- Deliver responsive technical support whenever required.
- Offer an easy-to-use and cost-effective solution.
After reviewing the available options, EGM Colombia selected Stellar Migrator for Exchange because it combined enterprise-grade migration features with ease of use, affordability, and dependable technical support.
Solution and Benefits:
Using Stellar Migrator for Exchange, EGM Colombia successfully migrated more than 90 Microsoft 365 mailboxes containing over 100 GB of mailbox data from a shared Microsoft 365 tenant to its newly established dedicated tenant.
The migration was completed in approximately two weeks as a single coordinated project.
Features such as batch mailbox migration, automatic mailbox mapping, resume migration, and real-time migration monitoring enabled the IT team to organise mailbox transfers efficiently and closely monitor progress throughout the project.
The customer also found the software straightforward to install and configure. Clear implementation guidance and continuous support from Stellar's technical team helped ensure that every stage of the migration progressed smoothly.
Following the migration, EGM Colombia gained complete administrative control over its Microsoft 365 environment, including users, licences, security settings, and services. More importantly, the organisation preserved historical mailbox data while maintaining business continuity and avoiding significant disruption to employees.
Conclusion:
With Stellar Migrator for Exchange, EGM Colombia successfully completed its Microsoft 365 tenant-to-tenant migration while maintaining business continuity and preserving years of valuable mailbox data. The organisation securely migrated more than 90 Microsoft 365 mailboxes and over 100 GB of business-critical email data to its own dedicated Microsoft 365 tenant. The migration provided EGM Colombia with independent administrative control over users, licences, security policies, and Microsoft 365 services, creating a more secure and scalable IT environment for future growth.
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