I have client software application that is installed on about 30 Windows 2000 boxes (30 users).
The Client application connects (via intranet) to a remote host that houses an oracle database.
Logon to the database is controlled via the users' Windows 2000 username/password.
Under MOST circumstances, users are able to use the client application to access the database.
However, at some SMALL BUT SIGNIFICANT FREQUENCY (~ 5 times per day) SOME users are denied access to the database and the following error shows up in the log files: Id:  Error code = 1326: unknown user name or bad password.
This error is TRANSIENT (i.e. it lasts anywhere from 5 to 30 minutes and then spontaneously resolves itself). And no, they are not mistyping their usernames/passwords.
The network is not under heavy load, and I feel that by the given error that this is some type of security or networking issue, but I know next to nothing about Win2k.
Any idea as to where I might poke around to fix the issue?
I have contacted software vendor but haven't heard back yet and am looking for suggestions.