Ask HN: Migrate from Office365 to G Suite. Specifically OneDrive to Google Drive

We're currently on Office365 and would like to migrate a 300 person company to G Suite.

I've already setup a G Suite account and migrated a few users. Google lets you migrate Outlook calendar, contacts, and emails as easily as selecting a few checkboxes.

I'm not sure how to migrate each user's OneDrive data to Google Drive.

Can anyone suggest any tools or services that let you do that?

Thanks!