flip calls to desktop

Provider was able to answer phones on his desktop if i needed to transfer a call to him in his office. Per ringcentral employee it is called "flip call" but since update no longer able to do. Providers loved this feature. per ring central IT feature is only available to use between two mobile apps which does not make sense because why would calls for the business go to an employees personal cell phone to flip call to business desktop. per my provider the feature has been in use for 2 years and stopped in march after an update