Hello Rob,
Thank you for your message.
You can mass update the Hosts via the
Remote Install Tool as described in
this tutorial for Advanced update method that allows you to update or change the existing Host settings.
In order to specify another server for the Hosts you want to update, you only need to create a
custom MSI installation package using the
MSI Configurator tool:
1. On
Step 3 - Advanced options of the configuration process enable the
Set or update Internet-ID connection settings checkbox.
2. Select one of the following radio-buttons depending on the intermediary server you want to use:
Use default (public) Internet-ID server — to use our company's servers for Internet-ID connection
Specify custom Internet-ID server — to specify your custom self-hosted RU Server
3. Enable the following checkbox:
When updating existing Hosts, overwrite their Internet-ID server address with the specified address. This will allow the installer to replace the current Internet-ID server address of the existing Host installation with your selected Internet-ID settings.
For example, Step 3 - Advanced options window should look like this:

Finally, please select this custom MSI package in the Remote Install Tool window.
Hope that helps.