Message indication on your phone for another mailbox

[Foneguy01]

is there anyway that we can have a button light up and be labelled as a MSG WAIT button for another mailbox on your own phone?

 

[leejor]

You would have to have that extension appear on an additional line key, on that set and, the set would have to allow the message waiting lamp to light whenever either extension had a message. Some sets only allow the lamp to light when the main extension has a message. You might not have an indication (set display?) as to which line had the message.

This is about the only mailbox feature beyond the standard offerings.
https://www.3cx.com/docs/group-voicemail/