Migrate calendar events to G Suite

If you're migrating to G Suite from Microsoft® Exchange or Office 365™, you can migrate calendar events using the data migration service.

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

Before you begin

Is my legacy environment supported?

Yes, if you're migrating from the following Exchange Web Services (EWS) environments: Office 365, Exchange 2016, 2013, 2010, or 2007.

If EWS isn't your legacy environment, consider using another migration tool.

Is my G Suite edition supported?

The data migration service supports Drive Enterprise and G Suite Enterprise, Business, Basic, and Education accounts. Compare G Suite editions.

Note: If you have Drive Enterprise, you can only migrate contacts. You can't migrate email or calendar data.

Set up your legacy environment (required)

Before you can use the data migration service, you need to prepare the environment you're migrating from. For details, see Prepare your legacy environment.

Migrate calendar events

Set up the data migration service (required)
  1. Sign in to your Google Admin console.

    Sign in using your administrator account (does not end in @gmail.com).

  2. From the Admin console Home page, go to Data migration.

    To see Data migration, you might have to click More controls at the bottom.

  3. Select the Calendar option and click Continue.
  4. On the Calendar Migration screen:
    1. From the Migration source list, select the Microsoft Exchange or Office 365 mail server that matches your legacy environment (where you're migrating from). 
    2. Select the connection protocol of the legacy mail server by choosing an option:
      • To automatically determine the protocol, select Auto select (Recommended).
      • To specify the Exchange Web Services URL for your legacy service, select Exchange Web Services and type the URL. The URL is the is the address that Exchange uses to communicate with Exchange Web Services, for example, https://outlook.office365.com/EWS/Exchange.asmx.
    3. Enter the email address and password for your role account
  5. Click Connect.
  6. (Optional) If the connection fails, verify that the role account and connection protocol information is correct. Then, click Connect again.
  7. In the Migration start date and Migration options sections, accept the default options or choose to exclude data that doesn't need to be migrated

Next: Go to Migrate calendar events for a single user or Migrate calendar events for multiple users.

Migrate calendar events for a single user
  1. Complete the steps to set up the data migration service. 
  2. Click Select users.  
  3. Hover over Add Add and click Select user Select user.
  4. In the Migrate From field, enter the user's Exchange email address.
  5. In the Migrate To field, start typing the user's new G Suite email address and choose from the list of suggested users. 
  6. Click Start.
  7. (Optional) To migrate the calendar events of another user, repeat these steps. 

Tip: To exit a completed migration, click Settings Settings > Exit migration

Migrate calendar events for multiple users

Use a comma-separated values (CSV) file to map users on your legacy system to those on your new G Suite account. Ensure that you map all users and calendar resources that have a different email address on your G Suite domain. For details on how to format the file, see Formatting the CSV file.

  1. Complete the steps to set up the data migration service.  
  2. Check the Email address changed box and click Attach File.
  3. Select the CSV file that maps the users and calendar resources, and click Open.
  4. Click Select Users. If there are errors in your file, choose an option:
    • To update the file, click Cancel, fix the file, and reload the updated file.
    • To ignore the incorrect mappings, check the Ignore errors box.
  5. Hover over Add Add and click Select multiple users Select multiple users.
  6. Click Attach file and upload the CSV file. 

    Note: This file may differ from the CSV file in step 3 as it includes all the users and calendar resources to be migrated. See How to use the CSV files for details. 

  7. Click Upload and start migration.
  8. If there are errors in your file, choose Cancel to fix the file or check the Ignore errors box to ignore.

Tip: To exit a completed migration, click Settings Settings > Exit migration

Migration tips

  • You can pause, cancel, or exit a migration.
  • Click Settings Settings > View Migration Settings to view details of the connection settings for the migration.
  • Click Refresh Refresh to update the Status column.
  • It's easy to monitor a migration.
  • If you run subsequent migrations, any calendar events or secondary calendars that have already migrated won't be duplicated. Learn more


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