Where exactly do I assign numbers to a guest mailbox? Do I assign it under 2101 along with a station number?

thanks

I would make sta config 2101 uninstalled.

In 2141 - personal mailbox

All done in stations above and out side current extensions.
Maybe make 10 extensions and use for guests.,out agents ,etc.or how many you need.
I have a recent post ,re a light on other phones for guest mailboxes message lights ,if needed.