"Save As" option only help needed

I have Acrobat XI Pro on a Windows 7 OS. I have created a form that I need to have multiple users complete and save. I have changed the file properties to be a "read only" file through Microsoft. If you use the File menu in Adobe to save the completed form the only option is "Save As"; however, if you click the disk icon it changes the original form with the information the user recorded. How do I make this be a "Save As" only option?