While publishing in AutoCAD Architecture I was prompted to save the current list of sheets (which I wanted to this time) and mistakenly ticked the “Always perform my current choice option” on the dialog. This changes the default and and hides the dialog in future.
The result was every time I published multiple sheets I was prompted to save the selection. I couldn’t find the variable which controls this but restoring the “hidden” prompt allowed me to change my preference.
Go to [A button]>Options>System>Hidden Message Settings & tick the message you want to see again. Note that what you see in this dialog will vary per install/profile/user as it’s a dynamic list of the messages you’ve “hidden”.