How to Configure Google Drive Migration to Microsoft 365 Using Migration Manager

Overview

Microsoft Migration Manager allows organizations to migrate Google Drive workloads directly into Microsoft 365 services such as OneDrive for Business and SharePoint Online.

The migration solution supports:

Google My Drive to OneDrive migration
Shared Drives to SharePoint Online migration
Incremental synchronization
User and permission mapping
Migration reporting and monitoring

Migration Manager provides a centralized migration experience without relying on third-party migration utilities.

Supported Migration Scenarios

Supported Workloads

Google My Drive
Shared Drives
Folder structures
Microsoft Office files
PDFs and images
Shared permissions
Incremental synchronization

Unsupported or Limited Items

The following items may not migrate fully or may require manual validation:

Google Forms
Google Sites
Third-party application metadata
Unsupported file names
Google shortcuts
Files exceeding Microsoft 365 limitations
Certain external sharing permissions

Prerequisites

Before starting the migration, ensure all prerequisites are completed.

Microsoft 365 Requirements

Global Administrator account
SharePoint Administrator role
OneDrive enabled for users
SharePoint Online configured
Microsoft 365 licenses assigned
Migration Manager enabled

Google Workspace Requirements

Google Workspace Super Administrator access
Google Cloud Console access
Google Drive enabled
API access enabled

Required Permissions

Platform	Required Role
Microsoft 365	Global Administrator
Microsoft 365	SharePoint Administrator
Google Workspace	Super Administrator
Google Cloud	Project Owner

Pre-Migration Assessment

Before starting migration, perform a detailed assessment.

Recommended Tasks

Identify inactive users
Review storage consumption
Analyze sharing permissions
Validate OneDrive provisioning
Review unsupported file types
Check path and file naming limitations
Perform pilot migration testing

A proper assessment reduces migration failures and minimizes business disruption.

OneDrive Provisioning Validation

Ensure OneDrive is provisioned for all users.

Users can provision by signing in, or admins can use PowerShell:

Request-SPOPersonalSite -UserEmails [email protected]

Create Google Cloud Project

A Google Cloud Project is required to enable APIs, authentication, and service account integration.

Why This Is Required

Enable Google Drive APIs
Configure OAuth authentication
Create service account
Configure domain-wide delegation
Allow Microsoft Migration Manager access

Prerequisites

Google Admin Center access
Super Admin account
Google Cloud Console access
API access enabled

Steps to Create Google Cloud Project

Step 1 – Open Console

https://console.cloud.google.com

Step 2 – Create Project

Click project dropdown
Select New Project

Step 3 – Configure

Field	Value
Project Name	Custom name
Organization	Select org
Location	Select location

Step 4 – Create

Click Create
Wait for provisioning

Common Errors

Permission Denied

Cause: Insufficient permissions
Fix: Assign:

Project Creator
Organization Admin

Organization Policy Restriction

Cause: Security policy block
Fix: Allow:

API creation
Service account creation
Project creation

APIs Disabled

Enable via:

Admin Center → Security → API Controls

Enable Google APIs

Required APIs:

Google Drive API
Admin SDK API

Steps:

APIs & Services → Library
Enable both APIs

Configure OAuth Consent Screen

APIs & Services → OAuth Consent Screen
Select Internal
Provide:
- App Name
- Support Email

Create Service Account

APIs & Services → Credentials
Create → Service Account
Enter name → Create

Enable Domain-Wide Delegation

Open service account
Enable Domain-Wide Delegation
Save

Copy:

Client ID
Service Account Email

Create Service Account Key

Open service account
Keys → Add Key → JSON
Download securely

Configure API Access (Google Admin)

Admin Console → Security → API Controls
Domain-Wide Delegation → Add New

Enter:

Client ID
OAuth Scopes:

https://www.googleapis.com/auth/admin.directory.user.readonly
https://www.googleapis.com/auth/drive
https://www.googleapis.com/auth/drive.readonly

Configure Migration in Microsoft 365

Microsoft 365 Admin Center → Setup → Migration
Select Google Workspace
Upload JSON key

Start Drive Scan

Click Scan
Review:
- Users
- Shared Drives
- Storage
- Permissions

Configure Destinations

Source	Destination
My Drive	OneDrive
Shared Drives	SharePoint

Start Migration

Select users/drives
Click Migrate

Features:

Incremental sync
Retry
Reporting
Error logs

Monitor Migration

Status	Description
Queued	Waiting
In Progress	Running
Completed	Success
Failed	Needs fix

Migration Limitations

API throttling
Invalid characters
File size limits
Path limitations
Permission mismatches
External sharing differences

Shared Drive Permission Considerations

Links may need recreation
External sharing differs
Inherited permissions may change
Manual validation required

Post-Migration Validation

Files migrated
Folder structure intact
Permissions correct
OneDrive accessible
SharePoint working

Troubleshooting

Authentication Failure

Verify:

Delegation enabled
OAuth scopes correct
JSON uploaded

API Denied

Enable required APIs.

User Mapping Errors

Ensure users:

Exist
Are licensed

Final Cutover

Stop changes in Google
Run final sync
Validate reports
Inform users
Redirect to M365
Disable legacy access

Best Practices

Run pilot migration
Use incremental sync
Validate permissions
Skip inactive users
Communicate timelines
Monitor reports

Conclusion

Microsoft 365 Migration Manager provides a scalable and native solution for migrating Google Drive workloads into OneDrive and SharePoint Online.

Proper configuration of APIs, authentication, permissions, and mappings ensures a secure and efficient migration.

Careful planning, pilot testing, and validation are critical for success.