Skype for Business Server 2015 RGS agent receives a toast for a second call after agent accepts the first waiting call Content provided by Microsoft Applies to: Skype for Business Server 2015 Select Product Version All Products This issue intermittently occurs even if a Response Group Service (RGS) agent is still in the first call. Resolution To resolve this issue, install the June 2015 cumulative update 6.0.9319.55 for the Microsoft Skype for Business Server 2015 Response Group Service. More Information This issue occurs because Skype for Business cannot detect a successful call transfer in time. Last Updated: Jun 23, 2015 Did this solve your problem? Yes No Tell us what we can do to improve the article Submit Thanks! Your feedback will help us improve the support experience.