A family of Microsoft relational database management systems designed for ease of use.
Could you post the SQL view of the recordsource of the form and the subform? Do you have any macros or VBA code on the form? Is the database split (shared backend with tables, individual frontends with everything else)? If not - SPLIT IT RIGHT AWAY, that's a likely cause of the problem and of many other problems!
I cannot imagine what setting would allow data to be entered into a form with cut and paste but forbid typing... that's weird. Might it be possible to upload a trimmed-down (no confidential data) copy to a Dropbox or other file sharing site?