Office already had the ability for an administrator to choose which people or machines were included in different update channels via policy, although this was a central setting and a user couldn’t opt-in or opt-out themselves. Find out how to switch this on for your copy of Office and Teams, and how as an admin you can enable this for your users. Two recent updates for Microsoft Teams and Office (Microsoft 365 Apps for Enterprise) allow you to self-select whether you want to use Beta (Insider) features and Teams Preview features.