Professional Services
Google Workspace to Microsoft 365 Migration
Modern Collaboration & Identity Consolidation
Duration
1 month
Team
3 specialists
Locations
USA
Scope
Email & Calendar Migration
Project Overview
A professional services organization partnered with Spherium Consulting Group to migrate from Google Workspace to Microsoft 365 as part of a broader collaboration and security modernization initiative.
The engagement focused on migrating Gmail mailboxes, calendars, contacts, and collaboration workflows into Microsoft 365 while minimizing business disruption and preserving user productivity.
The project successfully transitioned the client to Exchange Online and the Microsoft 365 ecosystem, enabling centralized identity management, stronger security controls, improved collaboration capabilities, and tighter integration with Microsoft services.
Challenge
The client operated in a hybrid collaboration environment with users relying heavily on Gmail and Google Calendar for daily operations. Several challenges complicated the migration effort:
- Large mailbox and calendar data volumes across multiple departments
- Complex calendar sharing and delegation requirements
- Need to preserve historical email data and folder structures
- Mixed authentication and SSO integrations across SaaS platforms
- Minimal downtime requirements for business-critical communications
- Requirement for seamless end-user transition and training
The client also wanted to improve security posture by consolidating identity and collaboration services under Microsoft 365.
Technologies Implemented
Google Workspace
Microsoft 365
Microsoft Outlook
BitTitan MigrationWiz
Exchange Online
Solution Architecture
Phase 1: Assessment & Planning
Conducted discovery workshops to inventory mailboxes, aliases, shared calendars, and third-party integrations.
Analyzed existing Google Workspace configurations, mail routing, and authentication dependencies.
Developed a phased migration strategy with pilot migrations, rollback procedures, and communication plans.
Phase 2: Phase 2: Migration & Coexistence
Configured Microsoft 365 tenant, Exchange Online, and identity synchronization.
Migrated user mailboxes, calendars, and contacts from Google Workspace to Microsoft 365.
Established coexistence between Google Workspace and Microsoft 365 during the transition period to maintain uninterrupted email delivery and calendar functionality.
Phase 3: Security & Optimization
Implemented MFA policies across Microsoft 365.
Performed post-migration validation, mail flow testing, calendar permission verification, and user support sessions.
Optimized DNS, SPF, DKIM, and DMARC configurations to improve email security and deliverability.
Results & Impact
Mailbox Migration Success
100%
All production mailboxes and calendars migrated successfully with minimal downtime.
User Adoption
Rapid Transition
Users successfully adopted Outlook, Teams, and Microsoft 365 collaboration workflows within weeks of deployment.