Business Center License

I don't see it list in my licenses, but I do have Business Center in my tenat.  It shows in the waffle as well as in the admin center and I can open it up and see what's included in the Business Center.

I also have an E5 for some of my users, but also have a few business premium licenses within the same tenant.  Based on features included in the Business Center, it looks like it's something from the Business Premium plan that is now showing up for all users.  There wasn't anything I actually did to enable it, I think it just randomly showed up about a week ago?

I haven't had a ton of time to dig into it yet and figure out what all is there, or where it comes from, but you're not the only one seeing the service.