Exchange 2003 and 2007 getting erros

I have a 2003 and 2007 exchange server. I am getting 9340 and 9360 errors. I can no longer have a new client connect to the exchange server. It does not resolve the name when I hit check name. Owa works and clients already connected are fine. What does this sound like to you?
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In a co-existance environment where legacy exchange servers and 2007 are in the same exchange organisation.It is required to have OAB pointed to the new exchagne 2007 machine.And, you need to move all the mailboxes as soon as possible to the new box,then decomission legacy servers.i.e. remove recepient update service.

IF owa is working fine ,then you have schedule+free/busy public folder replicated between servers.
forgot to add something........
is autodiscovery working for you.please check.Did you add a SSL certificate in IIS?

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