Can we prevent Workplace users from attaching files that are too large or unacceptable file formats? Or at least add some sort of warning.

Currently, if a user attaches a file that is too large or an unaccepted type, Workplace Portal still processes it. So, to the user, it looks like the request went through. However, it will be shown without a Maintenance work request code and the status will be "Created". The user is unable to do anything with the request and system administrators are unable to see it.