In order to connect HowNow Online and Xero Practice Manager, you first need to obtain an API key that will allow the two systems to talk with each other. Firstly log into your Xero Practice Manager account. Once logged in navigate to the "Business" menu and select "Settings" as shown below:
Once on the settings page, click the "Add-ons" link under "Connections":
The add-ons page will list a number of third party tools, scroll under you see "HowNow", then click the "Generate Key" button next to it.
Now that you have your HowNow API key for Xero Practice Manager you can go back to HowNow Online and follow the simple steps to connect the two systems.