After November 2020, APNS (Apple Push notifications) will no longer work in Sametime V9 or V10 environments. Apple will drop support for the legacy APNS protocol that is used in Sametime V9 and V10. If you require mobile APNS (Apple Push Notification), Sametime will need to be upgraded to HCL Sametime v11.

I had the opportunity to try the implementation of HCL Sametime Meetings 11.5. Pre-Release. I tried to build on the previous step by step manual to implement HCL Sametime V11. I created a similar tutorial, which was created during my test deployment. Maybe it will help some again.