A family of Microsoft relational database management systems designed for ease of use.
No, no setting per se but at some point you may have used DoCmd.SetWarnings False and not turned it back on. So, go to the VBA Window and in the Immediate Window type this exactly:
?DoCmd.SetWarnings True
and hit enter.
Then see if it now confirms for you. If it works, you should try to find where you are setting the warnings to false and make sure they are turned on (that includes error handlers).
Bob Larson, Former Access MVP (2008-2010)