Fortune 500 Pharmaceutical Company Case Study
Post-Acquisition Tenant Migration
Client Profile
Global pharmaceutical company (16,800+ employees) consolidating IT infrastructure following acquisition of another healthcare company. Operating in highly regulated environment with strict data governance and compliance requirements.
The Challenge
Following a major acquisition, the client needed to migrate 16,800 mailboxes and 2,000+ ADMS identities from acquired company's O365 tenant into parent company infrastructure. Project faced:
Complex domain consolidation requirements with subsidiary brand preservation needs
Regulatory compliance requirements for healthcare/pharmaceutical data
Tight migration windows to minimize business disruption
Multiple concurrent workstreams (ADMS, Exchange, OneDrive, SharePoint)
Need for real-time executive visibility into migration readiness and risk
Our Approach
Data Foundation & Integration:
Designed and built migration coordination database integrating HR, ADMS, O365, Intune, Tanium, and SCCM data feeds
Developed business allocation logic and technical migration scenario assignments for each user
Established single source of truth for readiness, blockers, and prioritization
Governance & Process:
Oversaw creation of comprehensive communications plan with pre-migration, day-of, and post-migration messaging across 14 templates
Implemented daily coordination meetings and real-time status reporting
Established escalation protocols for VIPs, delegates, and critical business users
Risk Management:
Built executive dashboards providing daily completion rates, blockers, and gap analysis
Tracked migration events by region (NOAM, SOAM, EMEA, APAC) with milestone monitoring
Provided tailored reporting for project teams and leadership to enable rapid decision-making
Results
99.6% completion rate for 16,814 users
Only 11 users unscheduled at project close (extraordinary completion in complex environment)
Zero compliance violations during migration of regulated healthcare/pharmaceutical data
Audit-ready documentation maintained throughout engagement
Direct recognition from client leadership for program excellence
Business Impact
The migration enabled the client to consolidate infrastructure on schedule, maintain regulatory compliance, and position for expanded Microsoft cloud adoption—all while maintaining business continuity across global operations.