Clear MWI on Yealink with Voicemail Restful Phone App

I have Yealink T23Gs. I don’t need the MWI light on my Voicemail Restful Phone App button to indicate a new message.

How do I turn this feature off?

How do I clear the existing MWI on phones without having to listen to or delete voice messages?

Disable the MWI from the yealink phone web interface.

This is disabled on the phone’s web interface, but apparently doesn’t have effect on the Phone App MWI.

Change the mailbox from [email protected] to [email protected]

I think the only way to do this is request a disable feature.
http://issues.freepbx.org

Done:
http://issues.freepbx.org/browse/FREEPBX-12434