I got a problem with the Message Waiting Indicator. It takes about 5 minutes for the Unity to notify the phone that there is a new message.
The VM is arriving normally in the email inbox and I can check the new message through the phone.
So it seems that the Unity is sync very slowly,
After I checked the new message and delete it, the indicator is still there for about 1 minutes, not as bad as when it is arriving.
Is there any solution or optimizer that can help to solve this issue?