I received the following from Sametime Dev:
When Notes 12 ships officially, it will no longer be 122C – we’ll update our clientID listing when that ships to the official one. It will be 122C until then.
So if you allow this client in sametime.ini now, you will need to change the value when Notes 12 goes GA.
The Sametime embedded client in Notes 12 beta has a new client ID. Is 122C, so you have to add it in sametime.ini, on your Community server, in the allowed clients types if you want to use it
Please, see this post for an update
I updated a customer Sametime server from 11.0 to 11.5 and the integration of iNotes and Verse on Premises with Sametime stopped working.
I asked if anyone has seen this happen and my fellow HCL Ambassador Mathieu Fabien pointed me to a HCL technote, here, that explain what the problem is due to and gives the solution.