How to migrate Outlook messages and folders to Gmail

In this article we explain how you can migrate messages from Microsoft Outlook® to Gmail using the migration tool provided by Google.

1. Download, install, and import
You will use Google Apps Migration for Microsoft Outlook® to import data from a Microsoft®
Outlook PST file, by stepping through a simple migration wizard. You can import your mail, personal, contacts, and calendar events, either all at once, or one PST file at a time.

A) If you haven't already, sign in to your Google Apps account on the web at least once, to accept
Google's Terms and Conditions.

B) Install Google Apps Migration for Microsoft Outlook® on the computer where you run Microsoft Outlook®, which should not be running. The install program for this App is located at

2. Sign in to Google Apps

After starting Google Apps Migration for Microsoft Outlook®, you're prompted to sign in to your
Google Apps account. Signing in here lets Google Apps Migration connect to your account to get ready for importing.

A) Enter the email address that you use to log in to your Google Apps account.
B) Use the second option to enter your password:

Yes, I have a password: Enter your (email) password here.

C) Check Remember me if you think you might be importing data to this account again from the command line. That way, when you next import data from the command line, Google Apps Migration won't ask you to sign in.

D) Click Next in the wizard to continue.

3. Choose what Outlook data to import

Next, Google Apps Migration for Microsoft Outlook® asks you to select where to import data from.
ITS will migrate your Exchange profile for you. Use this utility to migrate PST files only. Do not migrate your exchange profile.


A)  Select From PST File(s) and browse to the file on your computer or network.

B) You can't import PST files that are read-only. The migration utility needs write permission to access your data.

C) If you've already imported data into this account, choose the appropriate migration option, as described below. (If you're importing for the first time, either option works fine):

  • Migrate all data: Imports all your mail, contacts, and calendar events. You can choose this option for your initial migration. Or, choose it if you've deleted all previously imported data from this account (such as after a test migration), and want to import all your data again.
  • If you already have data in this Google Apps account, choosing this option will import duplicate contacts and overwrite your existing calendar data (email won't be duplicated).
  • Migrate only new data: Imports only data that hasn't been imported before (doesn't duplicate contacts or overwrite existing calendar data). Choose this option to resume a migration that didn't fully complete (say, if you had to turn your computer off), or to import data that arrived after your first migration.

D) Click Next in the wizard to continue.\

4. Start importing data
Finally, you need to select what data to import—your email, contacts, calendar events, or all of the above.

A) Specify what to import, and whether to import only mail that was sent before or after a particular date (just check each appropriate box). To speed up your import, uncheck Junk mail and Deleted items as you probably don't need any of these messages.

Importing before or after a particular date? The date you choose is effective as of midnight GMT. Messages are migrated based on the time they were submitted to the Microsoft® Exchange server as outgoing message.

B) Click Migrate in the wizard to begin importing.

5. Monitor your migration
Once you start the migration, Google Apps Migration for Microsoft Outlook® begins to import data to your Google Apps account. Contacts are imported first, followed by calendar data, and then email. If you're importing more than one PST file, each file is imported in sequence (completing one before moving on to the next).

You can monitor your migration's process to see the number of items migrated and the number of items remaining.

When your migration has finished, you can click Start new migration to import more data (if you're migrating in stages). Otherwise, click Cancel to close the wizard.

You're now ready to log in to your Google Apps account!


What to expect during migration

• How long does it take? Depending on how much mail and other data you have, it might take several hours for all of it to import (although you can begin to work in your Google Apps account right away).

• Pause a migration. To temporarily halt importing, click Pause Migration. Click Resume Migration to continue importing from where you left off.

• Restart a migration. If your import is interrupted and you need to run the migration again (say, if you click Cancel in the wizard or if you have to shut down your computer), simply rerun the wizard. To avoid importing duplicate contacts, select the option to Migrate only new data.

• My Internet connection went away. If the migration is interrupted without closing the wizard say, if your Internet connection goes away—it will resume where it left off if the connection comes back soon. Otherwise, you should start a new migration. To avoid importing duplicate contacts, select the option to Migrate only new data.

Did everything migrate?

To see the status of your migration, such as any errors that might have occurred, click the Migration logfile link. This opens the log file for the current migration.


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