The Project.
Plan, a global charity, has utilised Exchange as its primary email platform. A strategic decision was taken to implement Office 365 and, as the first phase, migrate to Exchange Online. With a globally distributed workforce, a complex Active Directory and identity management infrastructure, and 12,000 mailboxes, this was one of the most complicated Office 365 implementations and migrations.
Requirements and Issues.
- Implement Office 365 tenancy and authentication
- Deploy authentication services into Azure
- Integrate Office 365 identity services with Forefront Identity Manager (FIM)
- Create migration solution and process
- Support migration of 12,000 mailboxes

Our Solutions.
- Azure platform designed and implemented
- O365 identity and authentication services deployed into Azure
- Integration with FIM completed (with partner organisation)
- Exchange hybrid configuration implemented
- Migration process tested and documented
- Migration process passed to Plan for supported execution

Outcomes.
- Migration process tested and documented
- Migration process passed to Plan for supported execution
- Plan migrated 12,000 mailboxes within the business-defined time window
- Up to 600 mailboxes per migration event were completed with minimal post-migration support
- Management overhead is significantly reduced
- Plan saves approx. £500K over 5 years
