Assume that you're a member of a Response Group Service (RGS) agent group that's associated with an agent anonymity RGS workflow and that the SIP address of the workflow uses a plus sign (+) as a prefix. After you dismiss an RGS group member notification, you continue to receive the dismissed notification when you sign in to Microsoft Lync 2013 (Microsoft Skype for Business).
Resolution
To fix this issue, install the December 8, 2015, security update (KB3114351) for Lync 2013 (Skype for Business).Note Lync 2013 was upgraded to Skype for Business in April 2015.
