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SBS 2008 #550 5.1.1 RESOLVER.ADR.RecipNotFound; not found ## error

I am getting these errors at random from internal users sending mail to internal users. There is only one server for this organization. All mail is routed through this server (no external relay). The email address they are sending it to is correct. If I turn off cached exchange mode on the client that is getting the error and delete the NK2 saved address from the clients machine- the mail will go through. If I turn cached exchange mode back on- then the error will come back.. sometimes (not necessarily to the same address). I only seem to get these undeliverables to users who have not been with the company for very long. I am thinking that there is a problem with the Global address list not caching correctly. Ideas?
   
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waysur
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waysur
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connectexCommented:
Switch to cached mode and force a complete download of the Global Address List (GAL). In Outlook, Tools->Send/Receive->Download Address Book. Uncheck 'Download changes since last send/receive', Select full details, and make sure the Global Address List is selected at the bottom. If there are any errors messages post them here. Also switch the folder list view and check you sync folders for recent errors.
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waysurAuthor Commented:
Sorry for the delay in responding to this. After pouring through the server I believe the problem to be in relation to the certificate that was installed. I am not entirely sure of this (I tried a ton of different things), but it appears to be working fine now.

Thanks
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waysurAuthor Commented:
Cert problem
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