Hi Experts,
I am upgrading whole cluster from 9.1 to 11.5. So far I have completed CUC Cluster. I have also upgraded all Call manger nodes in inactive partition. Now I am going to start IM&P in inactive partition. Once this is done, I will do switch version in this order CM Pub then SUbs then IMP Pub then IMP Sub.
Coming to my question: I have a doubt I don't see System > Presence Redundancy Groups option in 9.1 call manager. Do I need to add IMP nodes in Call manager after the successful switch version if yes; do I need to add them before I will switch version IMP or afterwards I can do.
Thanks in advance!
Muk
