In RS users can post comments on a particular report:
Does anyone know if it's possible to be notified when a comment is posted?
While we don't currently have this functionality in the product directly, but you could potentially use Microsoft Flow or some other service to send a note when a new comment is entered into the table in the catalog database.
This is something we're considering for a future release, but don't have a specific timeline when we'd be able to go ahead with that work at this time.
During testing, I noticed that when a comment is deleted from the Report Server, it is also deleted from the Comments database table. Is this going to change so that all comments are left within the table (with a flag that shows as deleted), even though no longer visible on the Report Server?