Most Common Issues with Salesforce Connected App in Veeam Data Cloud for Salesforce

As of Autumn 2025, Salesforce has restricted the use of uninstalled connected apps (see Salesforce article). Due to these changes, customers may encounter errors when connecting a Salesforce organization to Veeam Data Cloud for Salesforce.

When authorizing Veeam Data Cloud in a Salesforce organization, Salesforce automatically creates the Connected App “VDC Salesforce Backup.” The user authorizing the connection must have the “Approve Uninstalled Connected Apps” permission. Without this permission, Salesforce will deny the connection.

Below are common errors that may occur during authorization or re-authorization, with steps to resolve them.

Connected App is not installed

Salesforce error code:

OAUTH_APPROVAL_ERROR_GENERIC

Resolution

• Ensure the user authorizing the connection has the “Approve Uninstalled Connected AppsFrom Salesforce Documentation: This new user permission is automatically assigned to the System Administrator standard profile. Custom profiles aren’t automatically updated, including those previously cloned from the System Administrator standard profile. After the connected app usage restriction is enforced in September 2025, this user permission grants access to use uninstalled connected apps, bypassing the new usage restriction. It should only be assigned to highly trusted users, such as administrators and those involved in managing or testing connected app integrations. Salesforce recommend using care when assigning this user permission. For example, only grant to admin users and to users who manage connected app integrations and need to test the apps before installing on the org for access by other end users.” permission, then retry the authorization.
• If this error occurs when connecting a sandbox organization, run “Match Production Licenses to Sandbox without Refresh.”