Log in to your CallHippo account.
Go to the left sidebar menu of your dashboard and click on Integrations.
Select Sellsy and click on Integrate.
You will redirect the setup page. Now click on Connect your Sellsy button.
Now click on Link datasource and you will be redirected to Sellsy Login Page.
Enter your Sellsy username and password and click on the Login button.
Now it should say Datasource is linked. Click on Ok.
Now click on next and your will be redirected to your callhippo account and your status will be changed to Integrated.