Yes it is included, let me know if you have trouble setting it up.  [email protected] 

You will have to pay extra for the Data Access if you are wanting to sign in from 2 locations at the exact same time.

I understand that for multiple sage 50 users to create or modify transactions they must make an additional payment to activate Sage drive multiuser.

The query was focused on the case that a person acquires Sage 50 Premium 01 user, this license already comes with Remote Data Access

Yes, it does come with a one user license, but you cannot be signed in and using the program at the office and at home at the same time.  That scenario requires purchasing a multi user license.

how much if I want 2 or more users to use remote data access in full access mode from 2 different location?

It would be prorated depending on when you purchased your subscription and what version you have.  So if you have a two user program, you could have two people using RDA.  If you need more than two, you would have to purchase another user.

Please feel free to call us if you need specific information for your account.