My (Red) Message Waiting Indicator light is on but I do not have any messages. How do I turn it off?
MWI Behavior
MWI stands for message waiting indicator. When a caller leaves a message for a subscriber, Cisco Unity connection notifies the phone system to activate the MWI on the subscriber's phone which is done by turning on the red light of the phone along with a blinking message icon on the Phone.
If the MWI is staying on or not turning on :
1. Pickup handset
2. Type 1999
3. Press Dial
This should reset the MWI.
Changing a Cisco Unity Voicemail Greeting