Microsoft is retiring Skype for Business Online on July 31, 2021. The decision was made to consolidate products and focus resources on a single UCaaS (Unified Communications as a Service) platform - Teams. Teams offers features such as communication, collaboration, and productivity, combining the capabilities of Skype for Business with Office 365 and Slack-like tools. Companies need to plan their migration from Skype for Business Online to another platform like Teams or other alternatives. Microsoft has made it easy to migrate to Teams, but businesses should consider change management, features needed in the new platform, and futureproofing their tech stack during this process.