Case Study: Dimension Data achieves seamless migration to a single global email domain with Mimecast

Mimecast eradicates global email complexity for Dimension Data

Dimension Data, a global ICT services provider and member of the NTT Group, needed to consolidate roughly 12,500 employees across about 57 regional email domains into a single dimensiondata.com domain as part of a brand refresh, while also replacing five disparate regional email security systems—without disrupting global email continuity or complex backend dependencies.

After selecting Mimecast’s SaaS email security and intelligent Mail Transfer Agent, Dimension Data implemented centralized policy control and instant address‑rewriting to support a phased migration. The solution enabled simultaneous use of old and new addresses, zero downtime for users, and delivered reduced complexity and cost, centralized management and rapid global scalability.

Dimension Data

Laurent Leclercq

Head of Group IT Operations