Prevent passing of logon credentials

From: Richard Whitworth (richard.whitworth_at_hsbp.co.uk)
Date: 05/12/03 

Date: Mon, 12 May 2003 11:25:24 -0700

Users at a remote site authenticate to their own DC.

They also have a separate account with different login
name on my DC at my site for the purposes of
authenticating to my Exchange server when using Outlook.

When clients at the remote site fire up Outlook it takes
an age for them to be prompted to provide their login
credentials for my domain where the Exchange server
resides.

I had surmised that this was due to the clients trying to
pass the credentials for their own domain to my DC. I have
set up failure auditing of logon events and it appears to
support my idea since as each client attempts to access
the DC at my site, the event log fills with logon
failures, with the user name being the logon name for the
remote domain.

Now later in the year the domains will be merged so this
will not be a problem, but this is quite a way off and
users are understandably annoyed that its taking them upto
a minute to login to Outlook.

Does anyone know how to prevent Outlook from passing the
credentials like this?

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