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From: Russ Pitcher on 23 Feb 2010 05:13
I'm getting the same issue. Anyone got any ideas?

Russ

"Scott" wrote:

> internal exchange error #550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found
> ## - external to internal ok
>
> Outlook 2007
> Exchange 2007
>
> User1(a)domain.com has a mailbox on exchange.
> User2(a)domain.com has a mailbox on exchange.
> User 1 Outlook is configured to use exchange accounts.
> When sending fron scott(a)externaldomain.com to user2(a)domain.com , mail
> arrives.
> When sending from user1(a)domain.com to user2(a)domain.com i get the error
> below.
> ----------------------------------------------------------
> The recipient's e-mail address was not found in the recipient's e-mail
> system. Microsoft Exchange will not try to redeliver this message for you.
> Please check the e-mail address and try resending this message, or provide
> the following diagnostic text to your system administrator.
>
> #550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ##
>
>
> Diagnostic information for administrators:
>
> Generating server: SERVER.domain.com
>
> IMCEAEX-_O=domainGROUP_OU=FIRST+20ADMINISTRATIVE+20GROUP_CN=RECIPIENTS_CN=user2(a)domain.com
> #550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ##
>
> Original message headers:
>
> Received: from SERVER.domain.com by SERVER.domain.COM
> with mapi; Wed, 10 Feb 2010 14:58:09 +0000
> Content-Type: application/ms-tnef; name="winmail.dat"
> Content-Transfer-Encoding: binary
> From: "user1(a)domain.com"
> To: "user2(a)domain.com"
> <IMCEAEX-_O=domainGROUP_OU=FIRST+20ADMINISTRATIVE+20GROUP_CN=RECIPIENTS_CN=USER1(a)domain.com>Date: Wed, 10 Feb 2010 14:58:08 +0000----------------------------------------------------------No problem sending email externally from ANYDOMAIN to user2(a)domain.com.No problem sending email to any other user from internal to internal.Occationally when user2(a)domain.com emails user1(a)domain.com we can reply touser2(a)domain.com diretly.Its almost as if the path for the reply is open for a short space of time,i.e maybe the connection to a service is open for a period of time.Creating a new email always failes.Everything is routerd via this single E2k7 service.Single internal domain user 2003 server AD.Recent migration from E2K3 to E2K7 saw me migrate USER2 mailbox to E2K7,then back to E2K3, then delete from E2k3, setup a new, delete AD user,create a new AD user with same name, create new E2k7 mailbox. User appearedin disconnected mailbox list in E2k7, was then removed using this
link(http://www.mcpblog.net/Lists/Posts/Post.aspx?ID=38).Thank you for any helpScott
>
>
> .
>
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