The Yammer premium version provides tools for IT administrators and enterprise features such as Active Directory sync, single sign-on support, and integration modules for SharePoint, NetSuite, Salesforce.com and others.

FORBES: Executive Profiles: Disruptive Tech Leaders In Social Business -- David Sacks, Yammer

Instead, single sign-on is built into the handshake between enterprise systems and MobileSpan through the IT management console.

FORBES: Advantages of the MobileSpan Approach