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Import PST to Google Workspace – Methods & Best Practices

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Published By Mohit Kumar Jha
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Published On August 12th, 2025
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Reading Time 7 Minutes Reading

One of the biggest pain points when migrating to Google Workspace is importing PST files without losing data. I experienced corrupt PSTs and migration failures during the task. But now, I have found the most reliable solutions that will import PST to Google Workspace simultaneously.

In this guide, I’ll share all of my experiences and best practices I followed to make this task a breeze. So, let’s begin our discussion.

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 organisations 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 organise 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 import PST to G Suite:

  • 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:

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

Now, wait till the tool prompts migration is completed. Remember, this only works for small users’ data, and each message contains below 25 MB of data, including attachments, PDF, 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:

  • Download GWMME from Google’s official site.
  • Prepare a User List in CSV mapping PST files to user accounts.
  • Configure Admin Access in Google Workspace.
  • 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. 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.

So, all these approaches are offered by Google and are free. But, these three tools come with some limitations like PST corruption, data loss, being stuck at 99%, file size issues, etc.

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 offers more benefits to import PST to G Suite, including:

  • Import directly to multiple Google Workspace accounts.
  • Preserve folder hierarchy.
  • Skip duplicates.
  • Date filter for only relevant data migration
  • Easy-to-use UI to import PST to Google Workspace effortlessly
  • Delta migration for recently arrived data
  • 24/ Technical Support

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 all 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.