Problem

When you’re migrating from Google Drive, you might hit the following error:
GetUsers Error: Execution of request failed: https://apps-apis.google.com/a/feeds/{your domain}/user/2.0

Cause

This is because the OAUTH domain key does not have access to the provisioning feed.

Resolution

To solve this problem, login to the Google admin console and add the following feed to your domain admin key: https://apps-apis.google.com/a/feeds/user/#readonly

Feed permissions in Google Apps