I have an iOS app that is currently deployed to the Enterprise store. Now I want to also distribute it to App Store. Can I use the same certificate and provisioning profile from Enterprise version, or do I have create new? Also what about the App-ID?
The App-ID should be the same there is no need to change it. But you need to rebuild with a new production certificate and once when you created you will need to create a new provisioning profile.
Usually, this can be done automatically from xCode if you have the needed rights.