Run a delta import

After a successful data import, you can run a delta import to identify and import any data that was updated or added after the import completed.

What is a delta import?

During a delta import, the data import tool copies new data to your Google Workspace account. Depending on your import source, a delta import can include:

  • Email data
  • Email messages (updates any changes, such as a change to a label)
  • Calendar data
  • Contact data

A delta import skips over objects that have already been successfully imported and haven't been updated on the source account. These items are marked as skipped.

Start a delta import in your target account

You must be signed in as a super administrator for this task.

Before you begin: If you're running a delta import for Exchange Online data, review About Exchange Online delta imports first.

  1. In the Google Admin console, go to Menu and then Data and then Data import & export and then Data import.

    You must be signed in as a super administrator for this task.

  2. Click Run delta import.

When the import is complete, you get an email with import statistics. Any reports are attached.

About Exchange Online delta imports

  • If you map a new Exchange Online user to an existing Workplace user, a delta import copies all folders and messages from their Exchange Online account to their Workspace account.
  • If you map an existing Exchange Online user to a new Workspace user, a delta import copies only messages that were created or modified since the last import.
  • A delta import doesn't remove any data that you imported to Workspace. If you remove a previously imported user from your list of mapped users and then run a delta import, the user's imported data remains in Workspace.
  • If a previously imported message is moved from FolderA to FolderB in Exchange Online before a delta import, the message is moved from the Gmail label FolderA to the label FolderB during the delta import.
  • If a previously imported folder is renamed from FolderA to FolderB before a delta import, the corresponding label in Gmail is renamed FolderB.
  • If a previously imported calendar is renamed from CalendarA to CalendarB before a delta import, the corresponding calendar in Google Calendar is renamed CalendarB.
  • If a previously imported event is moved from CalendarA to CalendarB before a delta import, a new event is created in CalendarB in Google Calendar. The previous event in CalendarA isn't deleted.
  • Any change to an Exchange Online event is reflected in Google Calendar after a delta import.
  • A delta import updates contacts and labels, but doesn't duplicate them. However, if you exit an import and then run a new import, contacts are duplicated.