Multiple Domain OWA Access Denied

I have a site with multiple e-mail domains.

Most users have all e-mail address associated with their account, so, UserA might have e-mail addresses,,

If they try and access their OWA, they can get in, no problems with UserA and their password.

I have a few users who are setup with only e-mail addresses.  For instance, I have userB who's username is userbtk and their e-mail address is .  When they try to login to OWA, i put their username in as userbtk and their password and it just keeps reprompting for the password, eventually, 3 or so tries, we get access denied error messages.

Windows 2000 Server, Exchange 2000.


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SembeeConnect With a Mentor Commented:
When you state the users only have an email address in one of the other domains, do you mean just that?
A single SMTP address?

If so, that will cause problems with Exchange. You should ensure that all users have an email address on the default domain. It doesn't have to be the default email address, just the default domain.

For example, if your default domain was domain.local, but you also had addresses for and, then all users would have an email address on domain.local, as well as either/and email addresses on and

are they accessing owa from an fe, or are they going directly to their be?
if they're getting access denied fromt he fe, what happens if they go directly to the be?
has urlscan or iislockdown been installed on the box they're trying to access owa from?
what shows up in the iis logs, just a 401?
Have you tried logging in using their full UPN ( or with ADOMAINNAME\username? The domain in both of those examples is the active directory domain name, not the email address domain name.
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CoastalSlnsAuthor Commented:
I am just getting 401's in the log.

This is whether we are accessing the server locally or through the web from another location.
There are no urlscans or lockdowns setup.


When I login with their full username, i.e. i still get the same message. Same thing with Domain\Userbtk

be sure you're using the full domain name like\myusername

AmitspeedstarConnect With a Mentor Commented:

The following article on technet addresses the issue of 401 errors , and describes how to resolve it by setting up users smtp addresse. try this it may solve ur problem

CoastalSlnsAuthor Commented:

You had the right answer.

Thank you!


Your article helped me figure out a long term solution.

Thank you!
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