Hi Dr Carcamo,
If you have an existing Updox account, then its a simple process to link the 2 accounts. First step is to open your Updox application and sign on with a user with Admin privileges. On the top of the Updox screen, you will see a option for "Admin", click on that and select "Map AC Users". Walk through the mapping process for the users (its fairly straight forward). Once that is done, go back o the patient portal activation screen (in AC, click on View/Admin Options/Patient Portal). Check the box acknowledging that you have mapped updox users, and then click the Link Accounts button. AC will do the rest automatically.
We have a user guide and a video tutorial here:
http://amazingcharts.com/products/ehr-product-tour/patientportal/Please let me know if you have questions.