---
source_url: "https://learn.microsoft.com/en-ie/answers/questions/5549064/clarification-on-google-workspace-to-microsoft-365"
title: "Clarification on Google Workspace to Microsoft 365 Migration Limitations - Microsoft Q&A"
mirrored_at: 2026-08-22T01:02:24.505Z
host: learn.microsoft.com
cited_in_42a: true
mirror_canonical: "https://index.42a.ai/learn.microsoft.com/en-ie/answers/questions/5549064/clarification-on-google-workspace-to-microsoft-365"
---

> **Original source:** https://learn.microsoft.com/en-ie/answers/questions/5549064/clarification-on-google-workspace-to-microsoft-365

Hi @[Eric Goh Kheng Poo](https://learn.microsoft.com/en-us/users/na/?userid=3faa9d61-b2bc-403c-b432-6459a6261e14)

Thank you for reaching out via the Microsoft Q&A forum regarding this issue. It really helped me understand the situation better.

I understand you're supporting a client with a substantial migration from Google Workspace to Microsoft 365, and it’s great to see such a thorough assessment in place.

I’ve reviewed your concerns and provided guidance below based on current Microsoft recommendations and documentation. 

**Exchange Online Mailbox Size Limits** 

You're absolutely right that a standard Microsoft 365 E5 license includes a **100 GB** **limit** for the primary mailbox. For users with mailboxes approaching or exceeding 1 TB, the recommended approach is to leverage the online archive with the **auto-expanding archiving** feature. 

This feature allows mailbox storage to grow beyond the default limit, up to **1.5 TB per user**, and is supported for individual or shared mailboxes with a growth rate of up to **1 GB per day**. It’s particularly well-suited for users with long-term retention needs or legacy mailbox data and remains fully supported when retention policies or legal holds are in place. 

For details, you can refer to the official documentation here: 

-   [Learn about auto-expanding archiving | Microsoft Learn](https://learn.microsoft.com/en-us/purview/autoexpanding-archiving?view=o365-worldwide) 
-   [Enable auto-expanding archiving | Microsoft Learn](https://learn.microsoft.com/en-us/purview/enable-autoexpanding-archiving) 

**Google Drive to OneDrive/SharePoint Migration** 

For users with more than 1 TB of data, Microsoft supports cloud-to-cloud migration via **Migration Manager**, which is integrated into the Microsoft 365 admin center. This tool supports migrations from Google Drive to both OneDrive for Business and SharePoint Online, depending on the nature of the content. 

A best practice for accounts of this size is to divide content based on its purpose: 

-   **OneDrive for Business**: Ideal for personal files. Each user receives 1 TB of default storage, which can be increased to **25 TB** upon request.  
-   **SharePoint Online:** The ideal destination for shared and team-based files, ensuring they are accessible to everyone in a centralized, secure location. 

For more information, please see the official guide: [Migrate to Microsoft 365| Microsoft Learn](https://learn.microsoft.com/en-us/sharepointmigration/migrate-to-sharepoint-online#mover-retirement) 

**File Size Limitations** 

According to Microsoft’s published guidance, the **maximum supported file size during migration is 250 GB** when using Migration Manager, the SharePoint Migration Tool, or the Migration API. 

For files that exceed this limit, our recommendation is to **not** migrate them into SharePoint or OneDrive. Instead, this is an excellent opportunity to help your client move these files to a more appropriate storage solution: 

-   **Azure Blob Storage:** A cost-effective solution for archival or large, infrequently accessed files. 
-   **Azure Files:** A better option for extremely large files that still need to be actively accessed by users or applications via a file share. 

By moving these specialized files to a dedicated storage solution, you ensure the integrity of your migration and optimize your client's long-term storage strategy. 

We also recommend conducting a thorough pre-migration audit to identify redundant or obsolete data. This not only streamlines the migration process but can also reduce ongoing storage costs. 

Please don’t hesitate to reach out if you have any further questions. Wishing you and your client a smooth and successful transition to Microsoft 365. 

* * *

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