Customer story
A multi-state healthcare organization with 6,500+ employees was managing collaboration, security, and governance across a fragmented Google Workspace environment. We planned and executed a full migration to Microsoft 365 — mailboxes, files, and Teams — achieving a 99.9% migration success rate with no disruption to patient-facing operations.
Engagement facts
Client
US healthcare organization, 6,500+ employees
Industry
Healthcare
Region
Multiple U.S. states
Service
Google Workspace to Microsoft 365 migration
Stack
Exchange Online
SharePoint Online
Microsoft Teams
Microsoft Entra ID
user mailboxes migrated
migration success rate
120TB+
of email & collaboration data migrated
↓ Cost
lower Microsoft 365 licensing spend
The client
A multi-state healthcare organization scaling through acquisition
The client is a rapidly growing healthcare organization operating hospitals, specialty clinics, and administrative offices across multiple U.S. states. With more than 6,500 employees, the organization relied on Google Workspace for email, file sharing, communication, and collaboration.
The need
Google Workspace couldn't keep pace with growth and compliance demands
As the organization expanded through acquisitions and new facility openings, managing collaboration, security, compliance, and user administration across a fragmented Google Workspace environment became increasingly complex. Leadership selected Microsoft 365 as its strategic workplace platform to improve productivity, strengthen governance, and support future digital transformation.
- Fragmented collaboration — different departments used their own tools for file sharing and communication
- Security & compliance concerns — needed stronger identity protection and centralized governance
- Growth through acquisition — new facilities added separate Google Workspace tenants
- Limited integration — wanted a platform that connects with workflow automation and business apps
The challenge
Migrate thousands of users without disrupting patient care
Newly acquired facilities brought additional Google Workspace tenants, creating administrative complexity and inconsistent collaboration standards across locations. The organization needed to migrate 6,500+ users, their mailboxes, and 120TB+ of files to Microsoft 365 without disrupting healthcare and administrative operations. Our team laid out a phased migration roadmap and sequencing strategy to move every tenant safely.
"Star Knowledge delivered a highly structured and professional migration experience. Their team successfully guided us through a complex transition from Google Workspace to Microsoft 365 while maintaining business continuity across all locations."
SK
Healthcare Organization
The solution
A phased Microsoft 365 migration across mailboxes, files, and Teams
Star Knowledge’s Microsoft 365 architects, migration consultants, and cloud engineers ran a full discovery and assessment of the Google Workspace environment, then executed a phased migration roadmap designed to minimize disruption and ensure business continuity. Here is how the migration was executed.
Discovery & assessment
Google Workspace tenant analysis, mailbox inventory, Drive review, and security posture evaluation.
Migration strategy & sequencing
Phased roadmap covering secure execution, data integrity validation, and governance standardization.
Exchange Online migration
6,500+ mailboxes, shared mailboxes, distribution groups, calendars, and contacts migrated in scheduled waves.
Google Drive to SharePoint Online migration
Departmental repositories and shared workspaces moved into a modern SharePoint architecture.
Microsoft Teams deployment
Team structure, governance policies, and adoption support rolled out across departments.
Identity & security modernization
Microsoft Entra ID, MFA, Conditional Access, and role-based access controls implemented.
Benefits
What changed for the client
Fewer support tickets
65% reduction in Microsoft 365-related support tickets after migration.
Stronger security posture
100% MFA adoption and a significantly reduced risky sign-in rate.
Better collaboration
Standardized Teams governance and improved document discoverability across facilities.
Lower administrative overhead
50% reduction in administrative effort required from internal IT teams.
Technology
What we used
See how our Microsoft 365 migration team scopes a project.
Your migration
Want to migrate from Google Workspace to Microsoft 365?
Let’s plan your Microsoft 365 migration journey. Talk to our Microsoft 365 migration specialists — no cost, no obligation.
More migration work
Related case studies
