How to Migrate From Google Workspace to Office 365

Your business runs on Google Workspace. It’s served you well enough, but now you’re hitting its limits.

Maybe you need more sophisticated compliance tools, or your finance team is crying out for proper Excel functionality that Google Sheets can’t match. Perhaps you’re already using Azure for other services and the split ecosystem is causing headaches.

Whatever’s driving your decision, you’re not the first to make the jump. Businesses across the UK are crossing over from Google Workspace to Office 365, looking for better integration and features, along with a unified Microsoft environment.

The Microsoft ecosystem offers genuine advantages for growing businesses. Office 365 brings enterprise-grade security features that go beyond what Google provides, with really strong threat protection and data loss prevention built into the platform. For businesses already running Windows environments, the integration feels natural rather than forced.

Cost becomes a factor too. While Google Workspace (formerly known as G Suite) might seem cheaper initially, Office 365 often works out more economical at scale, especially when you factor in all the included features you get. Many organisations making broader GCP to Azure migrations find that consolidating their productivity tools under Microsoft makes both financial and operational sense.

The compliance story is pretty compelling, too. Microsoft’s investment in meeting industry-specific regulations means healthcare, financial services, and government contractors often find Office 365 the only viable choice. Add in features like advanced eDiscovery and detailed audit logs, and the platform starts looking like the essential choice.

Moving from Google Workspace to Office 365 is way more than just an email provider switch. You’re migrating an entire digital workplace.

So, Gmail becomes Exchange Online, with all your emails, folders, and labels needing careful translation. Google Drive transforms into SharePoint and OneDrive, requiring thought about document structures and sharing permissions.

Your Google Docs and Sheets need converting to Word and Excel formats. While most standard documents transfer smoothly, complex spreadsheets with custom scripts or specific Google functions might need rebuilding. Google Meet gives way to Microsoft Teams, bringing new possibilities for collaboration—but needing users to adapt to different interfaces and workflows.

Calendar migration brings its own challenges, too. Recurring meetings, resource bookings, and shared calendars all need mapping to their Office 365 equivalents. Contact lists, and organisational directories need careful handling to keep business continuity solid.

Microsoft has several tools available to make the transition easier. The Microsoft 365 admin centre includes migration options that handle the heavy lifting for email and document transfers. These tools work well for straightforward migrations, but complex environments might need you to use additional solutions.

The Exchange admin centre handles email migrations through various methods. Smaller organisations might use IMAP migration, while bigger ones could benefit from staged or cutover approaches. Microsoft’s docs have detailed guides for each scenario, helping you choose the right path for your business size and complexity.

The SharePoint Migration Tool tackles document transfers, maintaining folder structures and attempting to preserve permissions. It handles bulk transfers efficiently, though you’ll want to review permission mappings carefully after migration. Microsoft’s official guides walk you through step-by-step processes for different migration scenarios.

Third-party tools can fill gaps where Microsoft’s native options fall short. Solutions from vendors like BitTitan and AvePoint offer enhanced features for complex migrations, including better permission mapping and workflow preservation.

Before you touch any migration tools, prepare properly – it’ll stop most common problems. The time invested here will save you a lot during the actual migration.

• Scan and assess your environment: Understand what you’re actually moving by auditing your Google Drives and accounts. Years of organic growth often creates sprawling folder hierarchies and forgotten shared drives that need rationalising.
• Confirm identity mapping: Map all users and groups to their Office 365 equivalents upfront. This includes regular users, service accounts, and distribution lists. Getting these mappings right will prevent permission headaches and access issues that can derail migrations mid-flow.
• Review your data structure: Examine your folder hierarchies, sharing permissions, and document ownership. This is your chance to clean up redundant content and reorganise before moving to the new platform.
• Run test migrations: Migrate a small department or test group first, review the logs carefully, and adjust your approach based on what you learn. These pilot runs often uncover edge cases and specific configuration needs unique to your environment.

Email migration makes up the backbone of most Google to Office 365 transitions.

Before starting any migration, identity mapping needs confirming – associating each Google account and group with its Microsoft 365 equivalent. Microsoft’s Migration Manager and most migration tools handle this through CSV uploads, but verifying these mappings prevents access issues later.

The IMAP migration path works well for organisations under 150 users, allowing you to move email data while users continue working. This method transfers emails but not calendars or contacts, which need separate handling.

For larger migrations, staged migration lets you move users in batches. This approach suits orgs wanting to transition gradually; maybe department by department. Each batch moves completely before starting the next, reducing the risk and helping you learn lessons to improve any follow-up migrations.

Cutover migration moves everyone at the same time, working best for smaller organisations ready to switch in one go. This approach takes careful planning but minimises the period of running dual systems.

Gmail labels make for an interesting challenge. Office 365 uses folders instead of labels, so emails with multiple labels get duplicated into multiple folders. If you plan how to handle this before migration, it’ll prevent confusion and storage bloat later.

Moving documents from Google Drive takes some strategic thinking about structure and permissions. The SharePoint Migration Tool handles bulk transfers, but understanding where files should land matters more than the technical transfer itself.

Personal drives typically map to OneDrive for Business, giving each user their familiar file structure in a new location. Shared drives need more consideration – they might become SharePoint document libraries, Teams channels, or shared OneDrive folders depending on their purpose and usage patterns.

Google’s native formats convert to Office formats during migration, but make sure you review critical documents after transfer. Formulas in Google Sheets might behave differently in Excel, and Google Docs with extensive formatting might need tidying up in Word. Setting expectations about these changes will prevent nasty surprises post-migration.

Version history is something to think about, too. While you can preserve current versions, the detailed revision history from Google Docs doesn’t transfer. If historical versions matter for compliance or reference, you might want to consider archiving important documents before migration.

Not everything translates perfectly between platforms. Google Forms lacks a direct equivalent in Office 365: Microsoft Forms offers similar functionality but you’ll need to rebuild forms from scratch. Any Google Apps Script automation needs recreating using Power Automate or other Microsoft tools.

Google Sites need complete rebuilds in SharePoint or other platforms. The structures and features differ significantly enough that migration tools can’t bridge the gap. Make sure to plan for manual recreation of important sites, factoring this time into your migration timeline.

Chat history from Google Chat or classic Hangouts doesn’t migrate to Teams. If preserving these conversations matters for compliance, archive them before migration. Google Keep notes, Google Photos, and other similar services also lack migration paths to Office 365.

Companies using Google Vault face a few hurdles. Vault content, including archived mail and compliance holds, typically needs a separate migration approach to maintain regulatory compliance. These archives might need exporting and importing through specialised tools or professional services to preserve chain of custody and legal hold status.

File size restrictions can catch you out, too. SharePoint has different limits than Google Drive, and very large files might need special handling. If you have a handle on these limitations early, it should prevent last-minute scrambles during migration weekends.

Migration projects rarely run perfectly, but knowing the common stumbling blocks helps you prepare. Most issues fall into a few predictable categories that proper planning can address:

• Authentication headaches: Multi-factor authentication, app passwords, legacy authentication methods: they all need careful handling. Set up your Azure Integration Services properly before starting migration to avoid access problems.
• Bandwidth throttling: Both Google and Microsoft limit data transfer rates to protect their services. These restrictions can slow migrations to a crawl, so plan realistic timelines and think about scheduling transfers during off-peak hours.
• User resistance: People comfortable with Google’s interface might resist Office 365’s different approach. Early training and clear communication about benefits will help smooth the transition. Consider showcasing how features like Microsoft Copilot (the AI assistant) can boost their productivity in the new environment.
• Permission mismatches: Google’s sharing model differs from SharePoint’s permission structure, potentially leaving documents over-shared or inaccessible. Budget some time for reviewing and adjusting permissions post-migration.

Change management matters as much as technical execution. Start communication early, explaining why you’re moving and what benefits users will see. Focus on improvements rather than just changes – better Excel functionality and integrated Teams collaboration, for instance.

It’s worth identifying power users in each department who can become champions for the new platform. These enthusiasts could provide peer support, reducing pressure on IT teams and improving your adoption rates. Their feedback during pilot migrations also helps identify issues before a broader rollout.

Running parallel systems during transition adds complexity but can be a way of reducing risk. Users can fall back to Google Workspace if problems pop up, while you resolve issues without business disruption. This approach can be really good for organisations where even brief outages could impact revenue or customer service.

Training should focus on differences rather than comprehensive Office 365 education. Users need to know how to find their files, send emails, and join meetings from day one – the fancier features can wait until later. Many companies transitioning to Entra ID from traditional systems find this phased training approach stops people getting overwhelmed.

If you need more ideas on getting folks on your side, check out Microsoft’s 365 adoption and engagement guides.

Once data lands in Office 365, the real work begins. The migration might be complete, but optimisation opportunities can transform your new environment from functional to exceptional:

• Clean up duplicates and redundancy: Duplicate files from Gmail label conversion need cleaning. Redundant documents accumulated over years in Google Drive can be archived or deleted. This’ll reduce storage costs and improve findability.
• Establish governance quickly: Without Google’s unlimited storage buffering poor data habits, Azure cost management becomes more important. Set retention policies, bring in data classification, and establish clear ownership for shared resources.
• Configure SharePoint properly: SharePoint’s capabilities exceed Google Drive’s in many areas, but only if they’re properly configured. Set up metadata, content types, and workflows that make sense for your business to transform document management from simple storage to smart information architecture.
• Monitor and support adoption: Users struggling with specific features might need targeted training. Regular check-ins during the first months will identify issues before they become entrenched problems.

Moving from Google Workspace to Office 365 is a pretty big shift for any organisation. Doing it well involves thorough planning and realistic timelines — as well as clear communication throughout the process. Knowing what’ll migrate smoothly (and what won’t) will help you set appropriate expectations and budget adequate time for doing everything.

To make it all happen with minimum faff, treat the migration as a business transformation – rather than just a technical project. The tools and processes exist to make it a smooth move, but they work best when combined with proper change management and user support.

Whether you’re moving a handful of users or hundreds, the right approach and expertise make all the difference. At Synextra, we specialise in helping UK businesses navigate their cloud transitions, from initial planning through to post-migration optimisation. Get in touch to find out more.