GroupWise Address book icons meaning

Is there somewhere that will show the meaning of all the different icons that show up in a GroupWise personal address book?  We created a personal address book under an 'admin' user that lists all employees  that we then shared with our administrative staff.  When looking at the address book, I see that some user icons have a black 'X' on them.  Some have nothing on top of the user icon.  Some have a green dot on top of the icon.  Some have what looks like a clock face on top of the user icon.  It is not clear what any of these mean. 

All of the users above are GroupWise users; not external contacts.  As far as I can find, the manual only shows a basic person icon but not what the overlaid symbols on top of the icon represent.