Yes, even tough I don't think there is anything different between enabling the form in Acrobat X vs. Acrobat DC. It all comes down to the license that allows you to do that.

You mentioned that you are using Acrobat X - that version does have the 500 form limit. Acrobat DC no longer has that limitation in it's EULA. You can check for yourself (or have your lawyer check) by reviewing the Acrobat X EULA and compare it with the Acrobat DC version.

With the latest version of Acrobat, there is no 500 forms limit anymore.