A form pdf I created in Pro, then opened in Reader cannot be saved with the filled out info. I created it with no security, and with the extended property on. Both Pro and Readers are the latest versions.
What am I missing?
When you say "extended property", do you mean that you saved the file in Acrobat by doing: File > Save As > Reader Extended PDF > Enable Additional Features
How did you transfer the file to the computer that has Reader installed?
Are there any notifications or error messages in Reader? If so, what is the exact text?