On December 11, 2013, Centrify Corporation announced it would integrate Microsoft Active Directory, access control, and single sign-on (SSO) compatibility with Zoom's application.[12] By March 17, 2014, Zoom added the capability for participants to join meetings by dialing into a toll-free public switched telephone network number via its partnership with Voxbone.[13] The release of version 3.5 later in the year added mobile screen sharing to mobile devices running iOS.[14]