Message is sent successfully but MWI does not turn on

The system sends the message successfully. However, the MWI does not turn on.

Troubleshooting steps

On the Administration menu, click Messaging > Diagnostics > Diagnostics (Application).
From the Select the test(s) to run field, select MWI.
Enter the extension number of the user.
Click Run Tests.
The system displays the test results or errors in the Results area.
- If MWI lights during the test and the results indicate success, this indicates that Messaging works properly. However, you might have configured Communication Manager or Session Manager incorrectly.
- If MWI does not light during the test and the results indicate failure, there might be a problem with Messaging or a connection issue between Messaging and Session Manager.
On the command prompt, view InfoBridge.log on application server to check if Messaging creates and sends MWI to extension.
On the command prompt, view MWI.log to check how the system routes the MWI message to Session Manager. You can then run a query on Session Manager to debug why the system does not route the MWI to extension.