Microsoft Exchange is requiring FQD Name for webmail access?

We are running Microsoft Exchange 2003.  Our webmail users are having to put in emaill address for user name in order to log into webmail.  We use to just have to put in user name without the full email address.  Has anyone else had this problem before?
rodkenAsked:
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LeeDerbyshireConnect With a Mentor Commented:
Do you actually have Basic Auth still enabled?  Having only Integrated Auth will always require the domain name.  The default setting is to have both Integrated and Basic enabled.
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LeeDerbyshireCommented:
It's actually the User Principal Name that they are supplying.  This is usually the same as the email address, but not always.  Does it help if they log in with DOMAIN\USERNAME instead of just USERNAME ?
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rodkenAuthor Commented:
If they type domain\username it does work.  But we want them to be able to just type in user name like it used to.  This just all the sudden happen, and we don't know why.
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LeeDerbyshireCommented:
Go into Exchange System Manager, then into Servers/Protocols/HTTP until you find the Exchange Virtual Directory (not the Virtual Server).  In the Authentication properties, configure the Default Domain.  This is usually set to \ , but if that does not work, it might help to type in your domain name.  If it is all greyed out, then you have Forms-based Auth enabled, which is a problem, since it is supposed to take care of this itself, and there is nothing to configure.
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rodkenAuthor Commented:
When in the Authentication properties.  Our Default Domain is already in there.
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LeeDerbyshireCommented:
Do you have Forms-based Authentication (the blue logon page) enabled?
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rodkenAuthor Commented:
Forms-based Authentication is not enabled.
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LeeDerbyshireCommented:
Okay, thanks.  In the Authentication properties you found earlier, can you replace the domain name with the backslash \ .  It might take a few minutes for changes you make in ESM to transfer to IIS.
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rodkenAuthor Commented:
I have put it back to the backslash, and I am still having the problem.
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rodkenAuthor Commented:
All i needed to do was check the check box.  thanks for all your help.
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