[cisco-voip] Unity Extension Search ?

[Dane]

If I search Unity for an extension from the unity admin web interface,
will it show if an extension is added as an alternate extension some
where?

I ask because I have a phone with a second line that is showing it has
voicemail.  But there is no unity voicemail box associated to that
extension.

I did a MWI resync and the issue persists.   Kinda confused about it.