@Margo -
Thank you for the added condition. Appreciated. As you say, files already uploaded in the forms cause great trouble for our administrators. In the first video example, you can see that we are unable to remove invalid file-named files from the forms. I am trying to remove the file named Test&SomethingsWritingALongtitle.pdf and then perform a Save.
Do you have knowledge of this experience and how we might resolve the matter?
In the second video example, we have a form with a good file name, previously uploaded. When we revisit the form and attempt to upload an invalid file name and it is allowed, which then creates the same problem as the first video.
We have explored the "Library or List Control" to avoid this issue, but we have no elegant way to add metadata from the list to the file in the Document Library to relate the uploaded file directly to the item itself. In the third video sample, I have a Document Library upload field above the Attachment upload field. The DL control allows us to delete bad filenames. The Attachments control prohibits us from deleting bad filenames. BUT - the ampersand is still allowed to upload.