Migrating from Google Workspace to Microsoft 365 moves your email, files, calendars and collaboration onto the Microsoft stack — Mycelium 365 handles the full migration for Australian organisations with parallel co-existence, zero mailbox downtime and full data fidelity across Gmail, Drive and Calendar.
Most Australian organisations consolidating onto Microsoft 365 do so for the same reasons: tighter integration with the productivity tools their customers, suppliers and accounting platforms already use; access to enterprise-grade security through Defender, Entra ID and Intune without bolting on third-party tooling; and licensing efficiency when bundles like Microsoft 365 Business Premium replace Google Workspace plus a separate identity, MDM and email security stack. Microsoft 365 also gives Australian businesses a clearer alignment to the ACSC Essential Eight — application control, patching, MFA and admin privilege restriction — through native Microsoft tooling rather than Google add-ons. Data residency is preserved through Microsoft's Australian regions, and Teams, SharePoint and OneDrive provide a single collaboration fabric instead of the Meet, Drive and Chat split that complicates governance.
Every Mycelium 365 migration begins with discovery — a full user inventory, mailbox sizing, Drive footprint, shared drive mapping, calendar resource audit and dependency review for any apps that authenticate against Google Workspace identity. From there we move to tenant build: domains, Entra ID, Conditional Access, MFA, Intune baselines, Defender for Office 365, SharePoint information architecture and licensing assigned to match each role.
Mail co-existence is established so Gmail and Exchange Online can route between each other during the cutover window, then mailboxes, calendars and contacts are migrated in waves. Drive content is moved in parallel — personal files to OneDrive, shared drives to SharePoint document libraries — with permissions and external shares preserved.
DNS cutover flips mail flow to Microsoft 365 at the agreed window, after which users move fully to Outlook, Teams and OneDrive. We close out with decommissioning of Google Workspace licences, including timing guidance so you stop paying for both platforms once cutover is complete.
Most Australian Google Workspace to Microsoft 365 migrations complete in 4 to 8 weeks end-to-end. A 50-user organisation with a clean Drive footprint and standard mail history typically lands inside 5 weeks including tenant build, data migration, DNS cutover and 30 days of hypercare.
Timeline is driven by total mailbox size, Drive data volume, the number of shared drives, whether any business apps depend on Google identity, and how much hands-on user enablement is required for Outlook, Teams and OneDrive.
Mycelium 365 includes a 30-day hypercare period after cutover — daily check-ins, priority ticket handling, floorwalker support for the first week, and end-user training sessions — before the environment transitions into ongoing managed services.
A structured four-phase approach to move from Google Workspace to Microsoft 365.
Audit your Google Workspace environment, map users, mailbox sizes, Drive volumes and dependencies, and produce a phased migration plan.
Build your Microsoft 365 tenant — domains, licensing, Entra ID, Conditional Access, Intune baselines and security policies — before any data moves.
Migrate Gmail, calendars, contacts and Drive content in batches with validation at every stage and parallel running to protect business continuity.
Switch DNS, onboard users to Outlook, Teams and OneDrive with role-based training, and run 30 days of hypercare post cutover.
Every layer of your Google Workspace environment, mapped and migrated to Microsoft 365.
Gmail to Exchange Online — full history, labels mapped to folders, filters and shared calendars migrated with metadata intact.
Personal Drive content to OneDrive; shared drives to SharePoint document libraries, with permissions and external shares preserved.
Google Contacts and Groups migrated to Exchange and Microsoft 365 Groups with membership and ownership maintained.
Post-migration hardening with Entra ID Conditional Access, MFA enforcement, Defender for Office 365 and Intune device compliance.
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