Diverting hunt groups
Log into the business portal at https://portal.yourservices.co.uk/businessportal and sign in with your username/password.
When you are logged in, search for the site you require or just hit the search button, to show all sites in your company and select the appropriate one.
Once the site is selected, click the features tab
In here you want to select Hunt groups depending on what has been set up.
Select the hunt group in question and go to feature settings, and call forward.
Fill in the details how you want this set up, and hit save.