Email from one user delivers to other internal users OWA, but not Outlook internally.

I have one user who is able to send and recieve emails to and from external emails all day.
However, when sending emails to other users within the domain that email will not get delivered to the recipients Outlook, but it will appear in OWA. I'm stumped.

Running Exchange Server 07 on SBS 2008.
External mail is retrieved via pop connector.

All clients are on Outlook 2007
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dhruvarajpConnect With a Mentor Commented:
delete current and create a new mailbox profile for the user,
close the user's outlook who is not receiving emails

then go to
start > run
outlook /cleanprofile

See if that works.
it means your receiver's outlook not configured well.
ur mail shown his/her OWA means ur mail server working fine.
email shows in OWA but not outlook means receiver's email client program not configured the way it should.
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Are the other users receiving all other emails except User A ?
It is definitely an issue with the user's outlook, as OWA is a great test of what is on the mail server itself. Another thing to check is to make sure that the outlook client is online.. in the bottom-right corner it should show the current outlook status, it should say "Connected to Microsoft Exchange".
Run the Exchange 2007 BPA tool from tools.  Any issues reported here?
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