Forum Discussion
Office 365 Groups naming policy reaches public preview
https://support.office.com/en-us/article/office-365-groups-naming-policy-6ceca4d3-cad1-4532-9f0f-d469dfbbb552
Hasn't it been in Preview for ages now? Or was that Private? :)
It's now public, but I thought it was pretty public when Microsoft revealed the policy at Ignite 2016 (announcement) and then discussed its operation in depth at Ignite 2017. What has changed is that Microsoft call this an AAD naming policy now... maybe to help justify the need for AAD premium licenses.