180-User Google Workspace to Microsoft 365 Migration - Zero Data Loss, Zero Downtime
180 users migrated in 4 weeks. 99.9% uptime throughout. 35% reduction in per-seat licensing cost.
The Challenge
A 180-person professional services firm in Dubai needed to migrate from Google Workspace to Microsoft 365 to align with their enterprise client's procurement requirements and enable Entra ID single sign-on across their project management stack. The migration had to complete within a single financial quarter without disrupting ongoing client engagements.
Our Approach
Pre-Migration Environment Audit
We audited all 180 user accounts, 12 shared drives, 3 service accounts, and 47 third-party OAuth integrations before writing a single line of migration config. This surfaced two data residency complications and a legacy mailing list dependency that would have caused issues mid-migration.
Phased Migration Runbook
We designed a 4-wave migration plan aligned to the firm's department structure, with a pilot wave of 15 IT staff and department heads before the main migration. Each wave had defined rollback procedures and a 24-hour parallel mail flow window.
DNS & MX Cutover Coordination
MX record cutover was scheduled for a Friday at 22:00 Dubai time, with dual delivery maintained for 24 hours and real-time monitoring of both environments throughout the weekend.
Entra ID & SSO Configuration
Post-migration, we configured Entra ID with conditional access policies, MFA enforcement, and SAML integrations for the firm's project management and time-tracking platforms.
Results
100%
Uptime maintained throughout migration
0
Data loss incidents
180
Users migrated successfully
4 weeks
End-to-end delivery
Technology Stack
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