Problem is you can not have multiple call appearance buttons and a line appearance button to monitor extension calls. I figured out I would have 3 call appearance buttons on a set and if the user did not answer them, due to being busy or not around. I send them to an AA for the extension. They can then choose to leave a voice mail or press 1 to go to a hunt group where the others can get the call. Little cheesy but should do the job.

"It works on our end so it must be fine."