Hi @Gonzalez, Gonzalo M. (contracted)
When the Atom rendering extension creates an Atom service document, a unique identifier is created for the data feed, a URL that identifies the report, the Atom rendering format, and the name of the report item.
This may be related to the report server URL you configured. You can check this document: https://learn.microsoft.com/en-us/sql/reporting-services/install-windows/configure-a-url-ssrs-configuration-manager?view=sql-server-ver16.
Best regards,
Aniya