Hello Ed,
I am not aware of any reported problem with 7225 and DFS scanning. But depending on the erros, this can cover mode device models. Can you please describe a bit more your situation.
Please, also test normal SMB scanning. Set a shared folder and attempt to scan to that share.
Avoid spaces on file repository and path names.
Let us know of the error messages you are having. As a reminder, if a jobs fails to scan, it will be displayed on the completed job queue, as completed with an error. Please select the job details to provide further information.