Hi @Deshpande, Harshal [CORP/IN]
Can you please provide more details on whether you have multiple API's having the same backend? From the Azure portal, you need to navigate to individual API's setting and update the backend URL (hostname) as below screenshot. There is no way where you can update the backend URL for all the API's in one place, either you need to automate it using the REST API. If you have already created the global policy to set the backend service then you can update it and point it to your new backend hostname (URL).