Group Calendar Automatically Created

Technically, you can set up a room mailbox and have them add it as "location" for the appointment, which in turn will create a booking for the Room mailbox. You can set it up with automatic approval and relaxed conflict settings to automate the process and account for situations where more than one advisor is busy, but differentiating between the individual advisor's entries might be difficult, depending on what kind of information you want to be visible. There is a setting that configures each meeting request with a subject matching the name of the person that send the request, which might or might not be enough in your case. And as room calendars are visible by everyone in the company by default, you should be all set in terms of permissions/access.