Offline mode for CRM and then connecting back online...

Hello,

I am wondering if there is a way that when a user works in offline mode with CRM and they make changes, then get back online and sync their changes back up into CRM, is there a way to show a message that lets them know that fields that they are trying to update have been updated since they did their last download of the data and do they want to proceed? 

I could see this being an issue if there is nothing to stop them from overwriting changes that someone online just completed.  Hope this makes sense.  Thank you.