Customer noticed when they did manual call after that scheduled meeting list losing on the midlet menu.
Meeting list not appear until someone schedule new meeting.
Is there any idea for this weird problem ?
So you have a deployment with both TMS and CTS-Man managing the same endpoints? That is not going to work very well, as both management systems will push conflicting calendar items to the endpoints, and potentially "fight" for their feedback addresses. This is not a supported setup.
It's tough to say without many of the background questions Paula has asked. I will say that in my experience I have often seen this type of issue occur if the endpoint was managed by both a TMS and CTS Manager. You can only have the endpoint setup for one or the other, not both.