office 365 group expiration
Within the Office 365 Group Expiration setup there should be a way to set it such that all groups *except* specific ones are subject to the expiration setting. As it stands now it's the other way around; all groups or only the selected ones. In an environment where users are permitted to created their own groups (something I was told even Microsoft allows) you really need the expiration feature enabled by default. But there are certainly use cases where as an admin you will want specific groups exempted from this setting.