On October 23rd, Microsoft announced – a little out of the blue – they were going to introduce self-service purchase options for users on November 19th. The details of this change were put forward in a post in the message center, article MC193609 to be exact. In short, this option would introduce several changes for commercial tenants.
M365 - License Optimization Center
ENow Software's Microsoft License Optimization blog built by Microsoft MVPs for IT/Sys Admins.