Unable to access voice mail. When Messages is pressed on the phone, it does not go to the first line on the phone. It goes to the first line on an attached side car that has messages.
In order to resolve this issue, complete these steps:
The Always Use Prime Line for Voice Message parameter determines whether the primary line is chosen and becomes the active line when Messages is pressed. These are the valid values for this parameter:
This is a required field. The default value is false.
Alos you can refer the document When user presses the Messages button or when a second user calls, the calls do not automatically roll over to the next voice mail port when the first voice mail port is busy