Users of Adobe Acrobat XI, also known as Adobe Pro, may experience the following dialogue box constantly appearing.
To stop this message appearing when closing Adobe Acrobat Pro, please follow the step below:
1. Choose Edit > Preferences on the menu bar
2. On the window which appears choose Documents (in the upper left of the pop-up)
3. Uncheck Remove hidden information when closing document
4. Select OK to save the changes.