Exchange Web Services (EWS) Deprecation and Barracuda Cloud-to-Cloud Backup

Barracuda Cloud-to-Cloud Backup has migrated from Exchange Web Services (EWS) to the Microsoft Graph API. This migration ensures continued compatibility and security for your backups ahead of Microsoft's planned retirement of EWS in October 2026.

What This Means for You

Our Cloud-to-Cloud Backup implementation previously used EWS and has now migrated to the Microsoft Graph API. Barracuda Cloud-to-Cloud Backup has updated the application permissions accordingly to ensure continued compatibility and security for your backups.

Any customer who authenticates for the first time or reauthorizes an existing connection will automatically receive the updated permissions. Existing customers should reauthorize their connection now to ensure continued access to backup data.

How to Reauthorize Your Connection

To ensure you have the updated Microsoft Graph API permissions, reauthorize your connection by following these steps:

1. Navigate to the Settings page using the side navigation menu.

2. Locate the Microsoft 365 or Entra ID section.

3. Click Reauthorize to the right of the applicable section.

4. Follow the on-screen prompts to complete the authentication process.

Once complete, your connection will have the necessary updated permissions. For more information, see Settings Page.

Frequently Asked Questions

• Will Cloud-to-Cloud Backup stop working after EWS is retired?
  No. Cloud-to-Cloud Backup has migrated to the Microsoft Graph API, so your backups and access remain functional. We recommend customers reauthorize their connection to ensure they have the updated permissions.

• Do I need to do anything now?
  Yes. We recommend that existing customers reauthorize their connection to ensure they have the updated permissions. New customers authenticating for the first time will automatically receive the necessary permissions during setup.