saving a secured file

hello-

I have a PDF that I need to fill in and save. The file is labeled "SECURED" and so when I try to fill it in, it says the only way to save a copy is to print (and printing as a PDF is not an option). The company that sent me the PDF has assured me that all i need to do is click "enable all features" and i will be allowed to save the filled in information. I do not have that as an option (instead I get a purple banner that says "Please fill out the form. you cannot save a copy of this form." The company is not able to send a version that is not secured. I'm not sure what else to try! I've downloaded the most recent version of Acrobat; I've tried this on two different computers in two different locations, and on both Mac and PC. Anyone have a suggestion?

Thank you!