Zoom leverages SAML 2.0 for single sign-on with company's user directory such as the Microsoft Active Directory.  

There are 2 options to use SSO with AD: 

• Option 1:  Enable SAML on AD using AD FS 2.0. Please see http://technet.microsoft.com/en-us/library/dd727958(WS.10).aspx
• Option 2: Zoom works with Okta as well as other enterprise identity management platforms such as Centrify, Microsoft Active Directory, Gluu, Okta, OneLogin, PingOne, Shibboleth, and many others. Zoom can map attributes to provision a user to different group with feature controls.

To configure SAML with ADFS, see configurations and sample configs:

• https://technet.microsoft.com/en-us/library/hh305235.aspx
• https://docs.servicenow.com/bundle/madrid-platform-administration/page/integrate/saml/concept/c_ADFSIntegrationWithSAML2.0.html
• https://support.ideascale.com/setup/saml-sso-with-active-directory-and-adfs-20-30
• Configure Zoom with ADFS