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Migrating gmail from one G suite account to another

If you have Essentials edition Google Workspace edition (aka Gsuite), you can only migrate contacts. You can't migrate email or calendar data.¹⁾

The data migration service does not remove data from the source mailbox, nor does it remove the original source mailbox. All eligible data is copied during a migration, not moved/deleted, and the data in your source mailbox remains after a migration.²⁾

You can’t migrate messages bigger than 25 MB.³⁾

Set up the data migration service

Sign in to your Google Admin console.
Sign in using an account with super administrator privileges (not your current account user@gmail.com).
From the Admin console Home page, go to Data migration.
Click Set Data Migration Up.
Under Migration Source, select Google Workspace.
Click Start.
Under Migration Start Date, accept the option that appears or choose a start date for your migration.
Under Migration Options, accept the options that appear or choose to exclude some data.
Click Select Users.

Migrate email from another Google Workspace account

Perform the following steps on your target Google Workspace domain (the account you're migrating to).

Migrate email for a single user

Click Add user.
In the Source Email field, enter the user's legacy Google Workspace email address.
In the Google Workspace Email field, start entering the user's new Google Workspace email address and choose from the list of suggested users.
In the Password field, enter the user's password for their legacy email account.
Click Start.
(Optional) To migrate another user's email, repeat these steps.

Migrate email for multiple users

Click Bulk upload with csv.
Click Attach File to upload the migration CSV file containing the legacy email addresses and the new Google Workspace email addresses.
For details on how to format the file, see CSV file format with the data migration service.
Click Upload and Start Migration.
If there are errors in your file, choose an option:
To update the file, click Cancel. Then, upload the updated file.
To ignore the incorrect mappings, check the Ignore errors box.

Tip: To exit a completed migration, click Moreand thenExit migration.

CSV file format

Tested on

References

¹⁾

https://support.google.com/a/answer/9476255

²⁾ , ³⁾

https://support.google.com/a/answer/7032598

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