I saw an article on DeveloperWorks by two Sametime on IBM i developers from China talking about some great features of Sametime 8.5.2 IFR1: offline messages, n-way file transfer and multiple file and folder transfer.
These features are covered under the Sametime Advanced license, but that no Advanced server installation was required.
Wow. I totally missed this. Old news for some perhaps, so I apologize if this is a rehash.
Since I already have some Sametime Advanced server licenses, but no Advanced server up and running, I decided to change the policy settings in my Sametime Community server and get see what happened. After a quick server reboot, I now have the ability to do offline messaging, n-way file transfer, multiple file transfer and folder transfer with clients that have the Sametime 8.5.2 IFR1 client.
It looks like the other features of Sametime Advanced require a physical Sametime Advanced server.