deleted group still appearing question

[gcrane@xxxxxxxxxxxxxxx]

Problem:   Deleted group is still being seen when selecting the group to send
mail to.

More detail of the problem:    "All Mail Users" group has departmental groups as
members.    Example:

All Mail Users
     Accounting
     Operations
     Personnel
     Purchasing
     Shipping-Receiving-Stock


I created a group named 'Shipping/Receiving/Stock' and added this group to "All
Mail Users".  Then I realized the slash was a reserved character.  I then
created a new group using dashes in place of the slashes and deleted the
original group from "All Mail Users" and added Shipping-Receiving-Stock to the
"All Mail Users" group.

Now when I send mail to "All Mail Users" Group a pop up window gives you warning
"No match was found for name:  Shipping/Receiving/Stock".  This is the deleted
original group.  Does the NAB have to be reorganized or something.  If yes, how
is that done?