To switch your Intelligent Integration Interface to the new Jersey API, follow the steps below:
Launch Intelligent Integration Interface from the desktop
Click the settings cog
Under EMIS Web Server, change the dropdown to Custom server
In the Custom IP address or URL box, enter the new Jersey API server address (make sure there isn't a space before the address when copying and pasting) : api-endpoint.gpnet.je
Click Save
These steps will need to be completed on all PCs that have the Intelligent Integration Interface installed.