System Options - Dismissed Messages

You can restore messages that you dismissed.

Click Tools > Options > System Options. Under Messages/Errors/Warnings, click Dismissed Messages.

Dismissed messages

Lists messages that you suppress by selecting Don't ask me again (or other similar option) in a dialog box. Select dismissed messages to restore them. Messages appear in the order that you dismissed them. If a message is truncated, hover over it to display the full message.