Viva Engage

Viva Engage (formerly Yammer) is an enterprise social networking service that is part of the Microsoft 365 family of products. It is used mainly for private communication within organizations but is also used for networks spanning various organizations. Access to a Viva Engage network is determined by a user's Internet domain, so only individuals with approved email addresses may join their respective networks. The service began as an internal communication system for the genealogy website Geni.com and was launched as an independent product in 2008. Microsoft later acquired Yammer in 2012 for US$1.2 billion (~$1.62 billion in 2024). Currently, Yammer is included in all enterprise plans of Microsoft 365, and evolved into Viva Engage as of February 2023. Viva was re-launched as an "employee experience platform" and to make it more community-friendly.