I setup a new 2008 core server as a print server. Users are getting the error "Unable to connect, access denied" in the status of the printers when they connect to the printers, though the connection is successful and they are able to print. I have found that adding the user to the local administrators group on the server makes this issue go away. However, I cannot find a command to add a group of users to the local administrators group, I can only add one user at a time. Is adding the group of users to the local administrators group the correct fix for this issue, and if so, what command can I use to accomplish that?