Couple of quick notes on upgrading Sametime to 11.5 (from Sametime 11.0 FP2). For this article I’ll concentrate on the chat server, so Sametime Community server and Sametime proxy. It’s based on a recent real-life install on Windows 2016 where all components sit on the same host. Firstly, it would be remiss not to say that generally with anything related to Sametime nowadays I’ll check what Ales Lichtenberg has written and here is no different. This guide works but I’d a couple of addendums from my experience.