This update adds an access code in the meeting invitation template in Microsoft Skype for Business 2015 (Lync 2013). This lets users input the conference ID by clicking the PSTN number that is inside an email message or a calendar invitation to join the meeting.
Note You can turn off the feature by creating a new OneTapJoinForPSTNCallingOnMobile Group Policy Object (GPO). The registry type of the GPO setting is DWORD. The setting is located in the HKCU\Software\Microsoft\Office\15.0\Lync\AddinPreference registry subkey.
Article ID: 4019641 - Last Review: 1 Jun 2017 - Revision: 11