Warning when closing multiple tabs in Adobe Acrobat Pro DC
Adobe Acrobat Pro DC should give a warning message that multiple tabs are being closed. This helps just in case the user has inadvertently entered a keyboard command (like Command-Q in macOS) instead of pressing Command-tab to switch to another open application.
Since we Haven’t Heard back from you for so long, We are closing this issue.
Please feel free to reach out to us for any other concerns if you have,
You can change this setting:
Open Acrobat>Edit>Preferences>General> Select the check box "Prompt before closing multiple files".> OK
Now you will get a prompt whenever you have multiple pdfs launched and you click the Acrobat Close button
Let me know if that solves your concerns ?