Starting today, the Yammer User Profile feature is now using user’s details from Azure Active Directory to populate profile on Yammer.

This evolution follows the announcement of the depreciation of Yammer DirSync (see http://blog.hametbenoit.info/Lists/Posts/Post.aspx?ID=747)

If you were still using Yammer DirSync, you should stop using it and ensure you are using the latest version of Office 365 directory synchronization (Azure Active Directory Connect – you can check the latest version here https://azure.microsoft.com/en-us/documentation/articles/active-directory-aadconnect-version-history/ and get the download link)