Key Takeaways
Google Workspace to Microsoft 365 Migration at a Glance
Migrating from Google Workspace to Microsoft 365 involves moving Gmail to Outlook, Google Drive to OneDrive/SharePoint, Docs to Word, Sheets to Excel, and Google Meet/Chat to Microsoft Teams. A well-planned migration typically takes 4–6 weeks and follows six phases: discovery, environment setup, pilot migration, bulk migration, cutover, and hypercare.
Common challenges include spreadsheet formula conversion (Google Sheets functions like ARRAYFORMULA don’t have direct Excel equivalents), Shared Drive permission mapping, DNS/MX record cutover timing, and user change management. With proper planning, zero data loss and minimal downtime are achievable.
All IT Services is a certified Microsoft Partner based in Sydney that has completed 100+ Google-to-Microsoft migrations for Australian businesses. We offer fixed-price engagements with 30-day post-migration hypercare included.
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What’s Inside
Introduction: Why Make the Move?
Google Workspace is an excellent solution — for small teams that don’t require deep Windows integration, sophisticated security controls, or advanced enterprise features. But as your organisation grows, the limitations become increasingly apparent.
We hear it regularly from our clients: “We’ve outgrown Google. We need something more powerful.”
Common Triggers for Migration
Organisations typically come to us when they hit one or more of these pain points:
- Need for desktop Office apps: Google Docs is convenient for online collaboration, but if your team relies heavily on Word’s advanced editing features, Excel’s complex formulas, or PowerPoint’s design capabilities, the Google alternatives feel limiting.
- Security and compliance requirements: Regulated industries—healthcare, financial services, legal—often demand the advanced security controls, data loss prevention (DLP), and compliance tooling that Microsoft 365 provides out of the box. Microsoft 365 includes Purview for eDiscovery and records management, which Google Workspace lacks.
- Windows integration: If your organisation runs Windows 10/11 across desktops and laptops, Microsoft 365 integrates seamlessly with your existing infrastructure. Entra ID (formerly Azure AD) provides enterprise-grade identity and access management that Google can’t match.
- Advanced enterprise features: Intune for device management, Conditional Access for zero-trust security, Power Platform (Power BI, Power Automate) for business intelligence and workflow automation, and Copilot AI integration for productivity—these are game-changers for scaling organisations.
- Unified communications: Microsoft Teams is far more than a chat app. It’s a full-featured unified communications platform with deep Microsoft 365 integration, superior meeting quality, and ecosystem extensibility.
- Australian compliance: For organisations handling Australian-regulated data, Microsoft 365’s compliance with the Australian Privacy Act, APRA guidelines, and PCI-DSS is built-in and auditable.
The reality: Google Workspace is a horizontal productivity suite. Microsoft 365 is a vertical powerhouse designed for enterprise-grade organisations with complex security, compliance, and integration requirements.
What Gets Migrated — The Full Breakdown
One of the biggest questions we hear is: “Will everything move over?” The short answer is yes—but with important caveats. Some services map directly, others require conversion, and a few need replacement with Microsoft equivalents.
Here’s the complete picture:
Email & Calendar
File Storage
Documents & Spreadsheets
Contacts
Messaging & Video
Forms & Surveys
Team Websites
Records & Legal Hold
Administration
Third-Party Apps & SSO
Data Conversion Considerations
Whilst the vast majority of data migrates without issue, here are the specifics you should understand:
| Data Type | Migration Status | Validation Required |
|---|---|---|
| Email messages & attachments | 100% migrates | Sample verification |
| Calendar events & recurring rules | 100% migrates | Delegation setup review |
| Contacts & distribution lists | 100% migrates | Verify nested group membership |
| Document formatting (Docs → Word) | 95%+ converts | Check complex formatting |
| Spreadsheet formulas (Sheets → Excel) | 90%+ converts | Test ARRAYFORMULA, QUERY, etc. |
| Presentation animations (Slides → PowerPoint) | 85%+ converts | Recreate custom animations |
| File permissions & sharing | 95% migrates | Verify external sharing rules |
| Chat history (Google Chat) | Does not migrate | Export beforehand if needed |
Potential Issues & How We Handle Them
After completing over 100 migrations, we’ve seen every curveball. Here’s what to expect and how we mitigate risk:
⚠️ Data Format Conversion Quirks
Google Sheets uses functions (ARRAYFORMULA, QUERY) that Excel doesn’t natively support. Complex formulas may need rebuilding. Our approach: We identify complex sheets during discovery, prioritise them, and either convert formulas or rebuild them in Excel format before go-live.
🔐 Shared Drive Permissions Complexity
Shared Drives often have intricate permission hierarchies. When migrating to SharePoint, inherited permissions can cascade differently. Our approach: We map permissions beforehand, test in pilot environment, and validate all access levels before full migration.
📧 Email Aliases & Distribution Groups
Google email aliases and distribution lists don’t map 1:1 to Outlook. This is a frequent source of confusion. Our approach: We create Microsoft 365 Groups or Distribution Groups in advance, pre-populate them, and test email routing before cutover.
🌐 DNS/MX Record Cutover Timing
The moment you switch MX records, all email flows to Microsoft. Timing this wrong means bounced mail. Our approach: We coordinate MX cutover during a planned maintenance window, have rollback plan ready, and monitor mail flow continuously during the transition.
👨💼 User Training & Change Management Resistance
The most common reason migrations fail isn’t technical—it’s that users haven’t adapted. Outlook feels different. Teams feels different. Help desk tickets spike. Our approach: We provide dedicated training sessions, create internal documentation, run a 30-day hypercare period with dedicated support, and proactively reach out to struggling users.
📱 Mobile Device Reconfiguration
Every smartphone, tablet, and laptop needs Outlook/Teams reconfigured. This happens post-migration. Our approach: We use Intune to automatically deploy Outlook and Teams with pre-configured profiles. Users get step-by-step instructions. We offer phone support for issues.
🔗 Third-Party App OAuth Reconnections
If you use Zapier, integrations apps, or custom scripts connected to Google Workspace, they’ll break until reconnected to Microsoft 365. Our approach: We audit all integrations during discovery, test each one before migration, and provide step-by-step reconnection instructions.
📅 Calendar Delegation & Shared Mailbox Recreation
Calendar delegation and shared mailboxes require manual reconfiguration. Delegates and shared mailbox members won’t automatically sync. Our approach: We pre-configure all delegations in Outlook before migration, conduct testing, and have users verify access immediately post-cutover.
📬 Large Mailbox Throttling
Migrating 100GB+ mailboxes can hit throttling limits, slowing the process. Microsoft’s service protects shared infrastructure by limiting parallel migrations. Our approach: We batch migrations intelligently, schedule large mailboxes during off-hours, and monitor migration progress continuously to avoid bottlenecks.
⚖️ Compliance & Legal Hold Data Preservation
If your organisation is subject to litigation hold or regulatory compliance, data must be preserved throughout migration. Any corruption or loss is catastrophic. Our approach: We use validated migration tools with audit trails, migrate legal hold data separately, verify integrity, and provide detailed compliance documentation post-migration.
🔄 Coexistence & Concurrent Mailbox Access
During migration, users may have access to both Google and Outlook briefly. Mail can be sent twice if not carefully managed. Our approach: We configure mail forwarding rules, set up inactive accounts, and brief users on the coexistence period to prevent duplicate sends.
📊 Large Shared Drive Migration Time
Shared Drives with millions of files take time to migrate. A 500GB Shared Drive can take hours. Our approach: We use multi-threaded migration tools, schedule during maintenance windows, and run parallel migrations to complete large estates within the planned window.
Why this matters: Most migration failures aren’t because the technology doesn’t work—it’s because these gotchas weren’t anticipated or managed. That’s why we have a proven playbook. After 100+ migrations, we know exactly what breaks and how to fix it before it does.
Our Proven Migration Timeline
Every organisation is unique, but our standard engagement spans 4–6 weeks from discovery to go-live. Here’s what a typical migration looks like:
Week 1: Discovery & Audit
Goal: Understand your current state completely.
- Inventory all users, mailboxes, and data volumes
- Identify Shared Drives, external sharing patterns, and permissions complexity
- Audit all third-party integrations and SSO dependencies
- Review security and compliance requirements
- Confirm licensing requirements and costs
- Document current process workflows that may be affected
Deliverable: Discovery Report
Week 2: Environment Preparation
Goal: Build and configure the new environment.
- Provision Microsoft 365 tenancy and licenses
- Configure Entra ID and hybrid identity (if required)
- Set up domains, DNS records (DKIM, SPF, DMARC), but hold MX cutover
- Create pilot group of 5–10 test users
- Configure retention policies, DLP, and compliance controls
- Set up Intune for device management
- Create Teams and SharePoint sites structure
Deliverable: Environment Ready for Pilot
Week 3: Pilot Migration
Goal: Validate the migration process on a small, friendly group.
- Migrate pilot users’ email, calendar, and files
- Test all integrations (Slack, Zapier, custom apps, SSO)
- Verify calendar delegations, shared mailboxes, and permissions
- Conduct mobile device testing (Intune enrollment, app deployment)
- Gather feedback from pilot users
- Refine runbooks based on findings
- Brief IT team on support procedures
Deliverable: Migration Runbook Validated & Approved
Week 4: Bulk Migration
Goal: Migrate remaining users in planned batches.
- Batch users into groups (typically 20–50 per batch)
- Run staged migrations (batch 1, 2, 3… over consecutive days/nights)
- Enable coexistence: Google → Microsoft forwarding active
- Monitor migration progress and troubleshoot any blockers
- Conduct spot-check validation on each batch
- Keep communication channels open with your team
Deliverable: 80%+ Users Migrated & Validated
Week 5: Cutover & Validation
Goal: Switch mail flow and complete final synchronisation.
- Schedule MX record cutover (typically Friday evening or weekend)
- Update DNS records to point to Microsoft 365
- Run final delta sync (catch any last-minute changes)
- Decommission Google Workspace mail forwarding
- Validate mail flow end-to-end
- Confirm all users can access Outlook, OneDrive, Teams, and SharePoint
- Test inbound and outbound email with external parties
Deliverable: Mail Flow Active on Microsoft 365
Week 6: Hypercare & Training
Goal: Support users through the transition and retire Google Workspace.
- Dedicated on-call support team (typically 2 weeks full-time)
- Conduct user training sessions (Outlook, Teams, OneDrive basics)
- Address common issues and gotchas (Outlook sync, Teams channels, SharePoint discovery)
- Monitor help desk tickets for trends
- Gradually hand off support to your IT team
- Plan Google Workspace decommissioning (30–60 day grace period recommended)
- Conduct final audit and handover documentation
Deliverable: Migration Complete & Hypercare Concluded
Flexibility: This timeline is indicative. Larger organisations (500+ users) may need 8–12 weeks. Organisations with complex integrations may need extra discovery time. We always adapt the timeline to your needs and risk tolerance.
Why Businesses Choose Microsoft 365
It’s not just about replacing Google Workspace. Microsoft 365 is a fundamentally different platform with capabilities that Google simply doesn’t offer. Here’s why our clients make the move:
Native Desktop Apps
Word, Excel, PowerPoint, Outlook—the industry standard. Full feature parity with offline support.
Microsoft Teams
Unified communications: chat, voice, video, plus meeting recordings and transcription included.
Enterprise Security
Microsoft Defender, Purview, Conditional Access, and advanced threat protection built-in.
Intune Device Management
Mobile device management and configuration at enterprise scale—enforce encryption, manage apps, control access.
Entra ID (Azure AD)
Enterprise identity and access management. Single sign-on to thousands of SaaS apps. Multi-factor authentication and conditional access policies.
Power Platform
Power BI for business intelligence, Power Automate for workflow automation, Power Apps for custom applications.
Copilot & AI Integration
AI-powered productivity: Copilot in Word (content generation), Copilot in Excel (formula suggestions), Teams meeting summaries.
Compliance & Governance
Australian Privacy Act, APRA, PCI-DSS, eDiscovery, legal hold, and records management built-in.
Windows Integration
Seamless integration with Windows 10/11. OneDrive Known Folder Redirect. Teams chat bubbles on desktop. Cloud sync across devices.
Real-World Impact
We’ve worked with organisations across healthcare, professional services, manufacturing, and financial services. Common outcomes after migration:
- ✓ 30–40% reduction in IT support tickets within 60 days (once users adapt, Microsoft 365 requires less troubleshooting)
- ✓ Improved security posture: DLP policies prevent accidental data loss; Conditional Access stops brute-force attacks
- ✓ Better collaboration: Teams channels organise conversations; SharePoint provides central document repository with version history and modern search
- ✓ Compliance confidence: Purview and Compliance Manager provide visibility into data; legal holds are enforceable and auditable
- ✓ Cost predictability: Transparent licensing, no surprise add-ons (unlike some cloud providers)
Why Choose All IT Services for Your Migration
Migration is complex. A botched migration can cost your organisation weeks of lost productivity. That’s why you need a partner who has done this before—many times.
Our Credentials
- ✓ Certified Microsoft Partner: We’re officially accredited by Microsoft, with engineers holding Microsoft 365 and Entra ID certifications
- ✓ 100+ successful migrations: We’ve moved organisations from 10 users to 2,000+ users. We’ve handled every edge case, integration, and gotcha
- ✓ Zero data loss guarantee: Every migration includes bit-by-bit validation. We use audit trails to prove data integrity
- ✓ Weekend and after-hours availability: We schedule cutover during your maintenance window, not ours. No 9-to-5 limitations
- ✓ Dedicated project manager: You’ll have one point of contact throughout. No revolving door of engineers
- ✓ 30-day post-migration hypercare included: We don’t hand off and disappear. Our team is available for 30 days after cutover to troubleshoot, train, and optimise
- ✓ Fixed-price migrations: No surprises. We quote upfront based on discovery findings. No hidden costs
- ✓ Australian-based support: We’re located in Brookvale, Sydney. Same timezone, same business culture, same regulatory understanding
Our Process (Why It Works)
We don’t just move data. We follow a disciplined, proven process:
- Comprehensive Discovery: We understand your current setup, integrations, compliance requirements, and user base before proposing a solution.
- Risk Identification: We identify complex areas (large mailboxes, custom scripts, compliance holds) and build mitigation into the plan.
- Pilot Validation: We test with a small group first. This catches issues before they affect your entire organisation.
- Staged Migration: We batch users intelligently, not a Big Bang. This reduces risk and allows us to course-correct if needed.
- User Training: We don’t just hand over keys. We teach your team how to use the new platform effectively.
- Hypercare Support: For 30 days post-migration, we’re here to troubleshoot, optimise, and ensure success.
Client Testimonials
“All IT Services managed our migration from start to finish. Zero downtime, zero data loss. The hypercare phase was invaluable—our team felt supported throughout the change. Highly recommended.” — Financial Services Firm, Sydney
“We were nervous about moving off Google Workspace. All IT Services took the anxiety out of it. Clear timeline, transparent communication, and they actually delivered on schedule. Our users were up and productive within days.” — Professional Services, Melbourne
Frequently Asked Questions
Ready to Make the Move?
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