When this issue occurs, users cannot connect to an application sharing session as a viewer in a conference in Microsoft Skype for Business or Microsoft Lync 2013. This issue occurs on users who install a Dolphin accessibility driver.
To resolve this issue, install the May 12, 2015, security update for Skype for Business.
Note Lync 2013 is upgraded to Skype for Business in April 2015.
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