It was on the announcements of October 2019:
Congregation Conferencing Services: The branch office is taking steps to standardize the electronic services used to deliver spiritual programs to congregations and publishers. Beginning November 1, 2019, the integrated audio and video-streaming and digital telephone answering services known as KHCONF (currently used by congregations in the U.S. branch territory) will be provided directly by the branch office. This does not affect the video-streaming service that sign-language congregations currently use. Further details will be provided regarding how congregations can show their appreciation for this arrangement.
Congregations who desire conferencing services are encouraged to utilize KHCONF. These consolidated arrangements will result in significant savings for congregations and the organization. Please submit any questions, technical support requests, and new service requests to KHCONF.US@bethel.jw.org using jw.borg e-mail.
To the extent possible, publishers benefitting from this provision should be encouraged to connect to meetings using the KHCONF app on their computer or mobile device. It may be necessary to assist publishers in using the app. Such efforts will result in additional savings for the organization.
Congregations who currently subscribe to KHCONF will continue to use the same connection information. In order to ensure a smooth transition, please confirm that any KHCONF invoices received before November 1, 2019, are paid.