Full Cutover Google Workspace to Office 365 Migration

When organizations decide to consolidate their productivity suite under Microsoft 365, a full cutover migration from Google Workspace offers the fastest path to cloud unification. Unlike incremental or IMAP-only approaches, this end-to-end service migrates the entire collaboration footprint—including Gmail messages, Google Calendar entries, Contacts, Tasks, and Google Drive content—into their native Microsoft 365 equivalents (Exchange Online, Outlook, OneDrive for Business, and SharePoint Online). Leveraging enterprise-grade migration tools and a meticulously orchestrated plan, we ensure data fidelity, metadata preservation, and user continuity, all within a defined cutover window. This service is ideal for companies seeking a clean break from Google Workspace with no coexistence period.

Scope of the Service

Our full cutover migration includes the comprehensive transfer of:

• Gmail messages (including labels, folders, and threading)
• Google Calendar events with attendees, reminders, and recurrence rules
• Google Contacts and contact groups
• Google Tasks and task lists
• Google Drive files and folder structures into OneDrive for Business and SharePoint Online
• User identity provisioning and license assignment in Microsoft 365

Note: If only email content is required, an IMAP-based migration is recommended as a lighter, more cost-effective alternative. This full cutover service is intended for organizations migrating the complete Google Workspace data set.

Migration Process

1. Project Initiation & Discovery

A kickoff meeting aligns stakeholders on timelines, success criteria, and roles. We then perform a health check of the Google Workspace environment—validating user counts, mailbox sizes, Drive storage usage, and IMAP/Calendar API accessibility.

2. Destination Environment Preparation

We configure the Microsoft 365 tenant by:

• Creating user accounts (via CSV import or AD Connect)
• Assigning appropriate licenses (Exchange Online, OneDrive, SharePoint)
• Validating domain ownership and preparing for MX cutover

3. Pre-Migration Validation

IMAP access, Calendar API, and Drive API permissions are confirmed for all users. High-risk accounts (executives, large mailboxes, complex folder hierarchies) are flagged for priority handling.

4. Data Migration Execution

Using specialized migration platforms (e.g., BitTitan, AvePoint, or Microsoft’s native tools), we perform a single-pass, full-content migration:

• Emails are migrated with original timestamps, sender/recipient info, and folder structure
• Calendar events retain invites, time zones, and recurrence patterns
• Drive files are transferred to OneDrive, with path and naming compliance enforced

5. MX Cutover & Final Validation

Upon data sync completion:

• MX records are updated to route inbound mail to Microsoft 365
• Users are instructed to stop using Google Workspace
• Final verification ensures all data is accessible and functional across Outlook, Teams, and OneDrive

Roles and Responsibilities

IT Partner Responsibilities

• Assess source environment and validate data integrity
• Configure Microsoft 365 tenant and user provisioning
• Execute end-to-end data migration with monitoring and error handling
• Set up OneDrive and SharePoint profiles per user
• Communicate migration timeline and user instructions
• Deliver final project closeout report

Client Responsibilities

• Appoint a dedicated project liaison
• Provide Google Workspace Super Admin access
• Ensure Microsoft 365 tenant and licenses are ready
• Enable IMAP, Calendar, and Drive API access for all users
• Manage DNS changes (MX, SPF, DKIM, Autodiscover)
• Configure network/firewall for migration tool connectivity
• Identify and prioritize high-risk users
• Instruct users to refrain from editing Google Drive files during migration
• Provide frontline end-user support during cutover

Expected Results

• All Google Workspace data fully migrated to Microsoft 365
• Users access email, calendar, and files via Outlook and OneDrive
• Seamless send/receive functionality with primary domain
• Preserved collaboration history and metadata
• Operational Exchange Online Protection and transport rules

Limitations and Important Notes

• OneDrive for Business enforces a 260-character file path limit (including username and library name); longer paths from Google Drive may be truncated or require renaming
• File and folder names containing restricted characters (e.g., #, %, ~) or prohibited extensions (e.g., .tmp, .exe) will be automatically sanitized or excluded
• Google Workspace free-tier accounts are not supported; only paid Google Workspace subscriptions qualify
• Real-time co-authoring history and Google Docs comment threads may not fully translate to Microsoft 365 formats

Prerequisites

• Active Microsoft 365 tenant with Exchange Online and OneDrive licenses
• Administrative access to Google Workspace (Super Admin)
• Control over DNS zone for email domain
• All source data must reside in a paid Google Workspace account
• Target destination confirmed as OneDrive for Business per user

Success Criteria

• Users can access Exchange Online mailboxes from any device
• 100% of migrated Gmail, Calendar, Contacts, and Drive data is present and usable
• Transport rules (e.g., mail flow, journaling) function as designed
• Email sending/receiving operates without interruption post-cutover
• Exchange Online Protection actively filters spam and malware

Project Deliverables

Upon completion, we provide a comprehensive closeout report including:

• Final migration status and validation summary
• List of migrated users and data volumes
• Documentation of any exceptions or unresolved items
• Detailed financial reconciliation

Extended documentation (e.g., migration runbook, rollback guidance) is available upon request for an additional fee.

Why Choose IT Partner?

We specialize in high-fidelity, full-scope cloud migrations with a zero-compromise approach to data integrity and user experience. Our Google-to-Microsoft 365 cutover service combines automation, compliance awareness, and proactive risk mitigation to deliver a clean, fast, and auditable transition—so your team can embrace Microsoft 365 with confidence from day one.