BCC Migration Project: Harz Energie Email Migration to Microsoft 365
As part of a transformation program, the energy provider decided to migrate from its long-standing HCL Domino email environment to a modern, cloud-based Microsoft 365 solution.

ABOUT THE CUSTOMER
Harz Energie GmbH & Co. KG – Reliable Service for Over 290,000 People
As a regional energy provider, Harz Energie GmbH & Co. KG is responsible for supplying electricity, natural gas, and drinking water to over 290,000 people in the Harz, Harzvorland, and Eichsfeld regions. As part of a transformation program, the energy provider decided to replace its long-standing HCL Domino mail environment with a modern, cloud-based Microsoft 365 solution.
INITIAL SITUATION & CHALLENGE
From HCL Domino to Microsoft 365 – Modernizing an Evolving Infrastructure
For years, Harz Energie had been operating an established HCL Domino email environment that served as the communication backbone for approximately 400 employees. With the strategic decision to migrate to the cloud, the company needed a competent partner who could not only ensure the technical migration but also address individual requirements and provide a transparent overview of the entire infrastructure.
| CHALLENGES | REQUIREMENTS FOR THE SOLUTION |
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THE SOLUTION
BCC Cloud Migration Service: Structured, Phased, and Customized
At the start of the migration project, Harz Energie’s infrastructure was systematically mapped using the BCC Analyzer to gain transparency regarding data, users, and email accounts. This in-depth analysis formed the basis for a customized migration strategy.
Once the analysis was complete, the nearly 400 users were migrated in several phases using the BCC Cloud Migration Service, allowing Harz Energie employees to transition to Microsoft Cloud services gradually and without disrupting daily operations.
“The collaboration between Harz Energie and BCC Unternehmensberatung GmbH was very pleasant from the very beginning. BCC provided us with extremely competent advice and was always available to answer our questions. BCC also addressed our specific requirements and was able to implement them to our complete satisfaction. That’s exactly the kind of excellent collaboration one hopes for.”
Luis Holzapfel · System Administrator, Harz Energie
RESULTS & ADDED VALUE
Seamless Migration—and a Satisfied IT Team
According to IT Director Rüdiger Heine, the migration went completely smoothly. All approximately 400 user mailboxes were successfully migrated to the Microsoft 365 environment. Since then, Harz Energie employees have been benefiting from Microsoft’s modern cloud services—with improved collaboration, greater flexibility, and a future-proof infrastructure.
“We are pleased that we chose BCC Unternehmensberatung GmbH as our migration partner. The migration went off without a hitch.”
Rüdiger Heine · Head of IT, Harz Energie
NEXT STEPS
Expanding Microsoft 365 Adoption
With the successful email migration, the foundation has been laid for a more comprehensive use of the Microsoft 365 platform. Harz Energie can now leverage additional services such as Microsoft Teams, SharePoint, and OneDrive to further digitize and modernize internal collaboration.
CUSTOMER PROFILE
| ORGANISATION | Harz Energie GmbH & Co. KG |
| INDUSTRY | Energy / Utilities |
| HEADQUARTERS | Goslar, Niedersachsen |
| PERSONS RECEIVING CARE |
ca. 290.000 |
| PLATFORM | Microsoft 365 |
| SOLUTION | BCC Cloud Migration Service |
| MIGRATED USERS | ca. 400 |
