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Import PST to Google Workspace – Top 5 Methods & Best Practices

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Published By Mohit Kumar Jha
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Approved By Anuraag Singh
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Published On November 27th, 2025
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Reading Time 8 Minutes Reading
Migrating PST to Google Workspace is a common business requirement to move toward modern, cloud-based email solutions. A key part of this migration involves transferring local Outlook data files into Google Workspace Accounts. This guide gives everything that you come to know like how PST files work, why organizations import them, and why import PST to Google Workspace becomes and how we can easily convert Outlook PST to Google Workspace.

What is a PST File & Why Migrate PST to Google Workspace?

A PST (Personal Storage Table) file used by Microsoft Outlook to store emails, contacts, calendars, and more. However, when Outlook is configured to use the POP3 protocol, it stores all downloaded email in a local PST file, not the user’s full account data, like calendars or contacts, by default.

Many organizations want to import PST to Google Workspace because:

  • Decided on Microsoft 365 to Google Workspace migration while preserving historical emails.
  • Importing PST files into Gmail to make it accessible from any device.
  • Storing old emails in Google Vault for legal requirements.
  • Reducing the risk of PST file corruption or accidental deletion.
  • Gmail offers search capabilities and labels to organize email data easily.
  • Retiring local Outlook setups.

Whatever the reason, in the next sections, I’ll explain how to migrate PST to Google Workspace hassle-free and quickly.

How to Import PST to Google Workspace – Top 4 Methods

On May 14, 2025, Google announced an important change: The legacy Data Migration Service will stop supporting on-premises Exchange migrations after May 31, 2025. So, you have to switch to GWMME.

Google still provides three official paths to Convert PST to Google Workspace:

  • GWMME (Google Workspace Migration for Microsoft Exchange) for Admin-driven, batch PST imports.
  • GWMMO / GWSMO (Google Workspace Migration/Sync for Microsoft Outlook) for single-user PST import.
  • Google Workspace Migrate for large migrations.

I tried all these approaches, and the steps that I followed are mentioned below to import PST to Google Workspace. But before, if you don’t export Office 365 mailbox to PST for the importing procedure.

First, follow these instructions to back up Outlook data in the PST format:

  • Open Outlook and click File.
  • Select Open & Export > Import/Export.
  • Choose Export to a file and click Next.
  • Select Outlook Data File (.pst) and click Next.
  • Select the folder(s) to export.
  • Click Next and choose the location to save the PST file.
  • Set a name for the file and click Finish.
  • Enter a password for the PST file for security and hit OK.

#Solution 1. Import PST to Google Workspace Using GWMMO

If you’re importing PST files for a single user or a small team, it is recommended to use GWMMO. It’s a free tool provided by Google for Windows systems. Here are the steps to import PST to G Suite:

  • Step 1. Open Google’s GWMMO download page.
  • Step 2. Download and install the tool’s .exe file on your system.
  • Step 3. Now, launch GWMMO and log in using the Google Workspace account to import data.
  • Step 4. Grant the required permissions.
  • Step 5. Browse and select the PST file from your local storage.
  • Step 6. Select Email, Contacts, and Calendar for migration. Or, you can also choose to import only specific folders.
  • Step 7. Click Migrate to import PST to Google Workspace.

Now, wait till the tool prompts that migration is completed. Remember, this only works for small users’ data, and each message contains below 25 MB of data, including attachments, PDFs, and other data. Otherwise, Gmail won’t allow you to import data if it exceeds the limits.

Those who want to import PST to G Suite in batches opt for the next utility.

#Solution 2. Migrate PST to Google Workspace Via GWMME

If you’re dealing with multiple PST files from an Exchange server, then use GWMME. This tool allows batch migration for multiple users.

But, for bulk transition, you have to ensure some things:

  • PSTs must not be password-protected or corrupted.
  • Place PSTs in the expected folder structure: Top-level folder > user folders > PSTs.

Now, follow the steps to import PST to Google Workspace:

  • Step 1. Download GWMME from Google’s official site.
  • Step 2. Prepare a User List in CSV, mapping PST files to user accounts.
  • Step 3. Configure Admin Access in Google Workspace.
  • Step 4. Run the Migration.

So, after the migration is completed, if needed, you can enable IMAP in Google Workspace to access data within Outlook or services that support IMAP configuration.

#Solution 3. Importing PST via  Google Workspace Migrate

This Google Workspace Migrate Tool will be used for enterprise-level migration, as it supports migrating PST to Google Workspace simultaneously:

  • Install the Google Workspace Migrate appliance on a supported server.
  • Sign in to the Google Workspace Migrate console as an administrator.
  • Create a new migration project to import PST to Google Workspace.
  • Add and configure the source connector.
  • Map source users to target Google Workspace accounts.
  • Configure migration settings such as data types, mail, calendar, contacts, and Drive.
  • Run the migration to import PST to G Suite.
  • When everything is migrated, close the project.

#Solution 4. Migrate PST to Google Workspace Manually

  1. Open Outlook and navigate to the file.
  2. Click on open and export then press on Import/Export.
  3. Select Export to a file and press the next button.
  4. Browse Outlook data file(.PST) and hit on Next option to proceed.
  5. Select the Outlook folder as you wish to import in Google Workspace.
  6. Browse destination for exported file and hit on finish to get PST file.
  7. Now, Configure Google Workspace account in Outlook.
  8. Choose Import/Export again and select Import from another program or file.
  9. Select Outlook data file and choose PST file as you have exported earlier.
  10. Now, you have successfully migrated PST to Google Workspace.

Limitations of Manual Approaches

  • All approaches can become extremely slow when handling large PST files, especially over network connections or IMAP-based uploads.
  • Files over 10-20 GB may freeze, fail to process, or require splitting before import.
  • Contacts, calendars, rules, tasks, and auto-complete lists don’t migrate properly with many methods especially IMAP/manual.
  • Gmail’s label-based system can cause mismatches, duplicate labels, or missing folders common across all tools.
  • If a PST file is slightly damaged, most tools fail or skip data without clear warnings.
  • GWMME and Google Workspace Migrate required technical expertise and user-mapping which may not be reliable for tech-savvy users.

So, all these approaches are offered by Google and are free. But, manual come with some limitations like PST corruption, data loss, being stuck at 99%, file size issues, etc as we have discussed previously.

Those who want to migrate their files simultaneously without losing data can opt for a professional tool, which I’ll explain in the next section.

Alternative to Native Solutions to Import PST to Google Workspace

If you are handling large PST files over 50GB that are corrupted, then you can opt for SysTools PST to Google Workspace Migrator. It allows for decrypting multiple PSTs, removing corruption, and automatically importing the healthy files hassle-free.

 Download Now  Purchase Now

Not only this, but it also offers several modern features for importing PST to G Suite, including:

  • Imports PST files directly to multiple Google Workspace accounts.
  • Preserves folder hierarchy at the post-import stage.
  • Skips duplicate files to avoid data redundancy.
  • Offers a Date filter for only relevant data migration
  • Comes with an easy-to-use UI to import PST to Google Workspace effortlessly
  • Offers a Delta migration option to import recently arrived data
  • Provides 24/7 Technical Chat, Email, and Call support

Quick Steps to Import PST to Google Workspace Efficiently

So, don’t waste time on complex manual methods, just download this now for free, and follow the steps to import PST to Google Workspace:

  • Step 1. Open the utility, and select Outlook (PST) & G Suite.
  • Step 2. Choose data categories, i.e., Email, Contact, and Calendar. Leverage the Date filter if needed.
  • Step 3. Now, go to the source location where the PST is stored, and select it.
  • Step  4. Afterwards, in the destination window, provide the credentials, i.e., Admin Email, Service Account, and Certificate file.
  • Step 5. Now, fetch the source users via mapping options: Fetch Users, Import Users, and Download Template.
  • Step 6. Hit the Start Import button to import PST to Google Workspace.
Best Practices I Always Follow to Import PST to G Suite

Through trial and error, I’ve learned these practices:

  • Ensure the Office 365 backup best practices before starting the migration.
  • Check for corruption using ScanPST.exe (Outlook’s Inbox Repair Tool).
  • Split large PST files into smaller parts to avoid import issues.
  • Perform a test migration with smaller data to address errors in advance.
Author’s Verdict

I’ve personally seen how to import PST to Google Workspace simultaneously without data loss and errors. All the experiences I gained from my migration journey, I shared them in this complete tutorial.

I guarantee, now you have the proper knowledge of all Google’s native tools and a professional’s recommended advanced solution. You can opt for any according to your requirements to migrate PST to Google Workspace.