Which Version do I have?

[default22ruw0sy8brx]

I am trying to password protect a file and everyone at my office has adobe acrobat pro 2017. I am not sure if this means we have adobe 6.0 and later, adobe 7.0 and later, or adobe x and later. I need to know the version so I can pick the correct encryption level. thank you for the help, i really appreciate it.  

[Nesa Nurani]

Go to help->generate system report and where it says installed plug-ins look for version

[try67]

The version of the encryption has nothing to do with your version, but with the one used by the person opening the file.

If in doubt choose the lowest one available. It's extremely unlikely anyone with a version of Reader prior to 6 will open the file. That version won't even run on 99.9% of computers nowadays.

[gkaiseril]

I would open a PDF document and then select the "Properties" menu option and then the security tab. Next select the security option and see what options are available. For and Acrobat version 20## you should have all 3 options. The one you select will depend on the target view the end user will be using. If the PDF you are trying to secure is for use within your office, I would use the Acrobat X or later option.