Can new users log into webmail?
Yes
Can new users get their mail with a mail client?
Yes
Can new users open a user share by going to \\ip_address_of_server\?
No
Are new users on new workstations?
Yes and old workstations as well.
Can you open one of the new user's shares from your workstation?
No
After any of these tests fail, go into the server-manager, view log files panel and see if there is anything in the Messages log that gives you a clue as to why they failed.
Sep 21 14:14:02 esas smbd[11682]: [2009/09/21 14:14:02, 0] lib/util_sock.c:get_peer_addr(1224)
Sep 21 14:14:02 esas smbd[11682]: getpeername failed. Error was Transport endpoint is not connected
Sep 21 14:14:02 esas smbd[11682]: [2009/09/21 14:14:02, 0] lib/util_sock.c:get_peer_addr(1224)
Sep 21 14:14:02 esas smbd[11682]: getpeername failed. Error was Transport endpoint is not connected
Sep 21 14:14:02 esas smbd[11682]: [2009/09/21 14:14:02, 0] lib/access.c:check_access(327)
Sep 21 14:14:02 esas smbd[11682]: [2009/09/21 14:14:02, 0] lib/util_sock.c:get_peer_addr(1224)
Sep 21 14:14:02 esas smbd[11682]: getpeername failed. Error was Transport endpoint is not connected
Sep 21 14:14:02 esas smbd[11682]: Denied connection from (0.0.0.0)
Sep 21 14:14:02 esas smbd[11682]: [2009/09/21 14:14:02, 0] lib/util_sock.c:get_peer_addr(1224)
Sep 21 14:14:02 esas smbd[11682]: getpeername failed. Error was Transport endpoint is not connected
Sep 21 14:14:02 esas smbd[11682]: Connection denied from 0.0.0.0
Sep 21 14:14:02 esas smbd[11682]: [2009/09/21 14:14:02, 0] lib/util_sock.c:write_data(562)
Sep 21 14:14:02 esas smbd[11682]: write_data: write failure in writing to client 10.16.32.7. Error Connection reset by peer
Sep 21 14:14:02 esas smbd[11682]: [2009/09/21 14:14:02, 0] lib/util_sock.c:send_smb(761)
Sep 21 14:14:02 esas smbd[11682]: Error writing 5 bytes to client. -1. (Connection reset by peer)