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Cloud-to-Cloud Backup

Cloud-to-Cloud (C2C) backup is designed to protect your organization’s SaaS data — Microsoft 365 mailboxes, OneDrive files, SharePoint sites, and Google Workspace Drive content — using delta sync for incremental updates. You can connect a Microsoft 365 or Google Workspace tenant and define a backup configuration today, but syncing and restoring data is not yet implemented — see Running a Sync below.


Two authentication modes are available depending on your Breeze deployment:

If your Breeze instance has C2C_M365_CLIENT_ID and C2C_M365_CLIENT_SECRET configured, the one-click consent flow is available.

  1. Go to the C2C section in Breeze.
  2. Click Grant Access (or Connect Microsoft 365).
  3. You’re redirected to Microsoft’s admin consent screen.
  4. Sign in with a Microsoft 365 admin account and grant the requested permissions.
  5. Microsoft redirects back to Breeze. The connection is created automatically.

Google Workspace backup requires a service account with domain-wide delegation.

  1. In the Google Cloud Console, create a service account and enable domain-wide delegation.
  2. In your Google Workspace admin console, authorize the service account’s client ID with the required scopes.
  3. In Breeze, open the C2C connection wizard and select Google Workspace.
  4. Upload the service account key file.
  5. Click Connect.

Once connected, your C2C connections appear in the connections list showing:

  • Provider (Microsoft 365 or Google Workspace)
  • Connection status
  • Last sync time
  • Number of accounts/sites backed up

After connecting, create a backup configuration to define what gets backed up:

  1. Click Add Backup Config in the C2C section.
  2. Select the connection to use.
  3. Choose what to include:
    • Mailboxes — select specific users or all users
    • OneDrive / Google Drive — file storage for selected users
    • SharePoint sites — select specific sites (Microsoft 365 only)
  4. Set a sync schedule (how often to pull changes).
  5. Click Save.