Exelon — Large-Scale OneDrive Migration in a Nuclear-Regulated Environment
45,000 users and 120TB migrated inside Exelon's nuclear-regulated Fortune 100 environment — with MNPI compliance, after-hours execution, and zero data loss across nine months.
One of the largest compliance-sensitive OneDrive migrations on record.
Exelon Corporation, one of America's largest energy utilities, required retirement of all legacy home directories and migration to OneDrive for Business. Tens of thousands of users stored data on aging NetApp systems with decades of permissions sprawl.
The effort demanded MNPI compliance, after-hours execution, dual-platform tooling, and zero tolerance for business impact across nuclear-regulated operations.
A regulated environment with no margin for disruption.
- MNPI compliance requirements across all migration activities
- Decades of legacy permissions requiring cleanup before migration
- Multi-domain Active Directory complexity across the enterprise
- Network throttling risk requiring strict bandwidth controls and after-hours execution
- Edge-case file types requiring specialized handling — Access databases, OneNote, PSTs
Dual-platform architecture for maximum throughput.
Summit deployed SkySync and Microsoft Migration Manager in parallel — enabling greater throughput, redundancy, and advanced handling of file types that no single platform could manage alone. All migrations ran after hours with progressive bandwidth tuning to protect business operations across nuclear-regulated facilities.
Nightly waves. Morning validation. Zero surprises.
- Dual-platform migration architecture using SkySync and Migration Manager in parallel
- Scripted OneDrive provisioning and temporary admin access management via PowerShell
- Nightly after-hours migration waves with strict bandwidth controls
- Morning validation and immediate remediation before business hours began
- Admin access revocation after each wave and legacy directory retirement upon completion
45,000 users. 120TB. Zero incidents.
- 45,000 users migrated with zero data loss and zero business disruption
- 120TB transferred across nine months of nightly operations
- Legacy NetApp infrastructure fully retired
- All MNPI compliance requirements satisfied
- No incidents reported across nuclear-regulated operations