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RESOLVER.ADR.ExRecipNotFound after Cross-Forest Migration

Posted on 2011-09-26
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Last Modified: 2012-06-21

After a cross-forest migration of Users from an Exchange2003/Server2003-Domain into an existing Exchange 2010 Environment, we have problems with some Outlook Clients.

Computers and Users were migrated to the new domain, together with the corresponding Mailboxes.


Nearly everything runs fine, but on some Outlook Clients there seems to be an old cache entry for mail contacts:  if we try to send mail from one (migrated) user to other (migrated) users, the "To:"-address is correcly recognized as "user name <username@domain.com>", but mail bounces with the following error:

IMCEAEX-_O=MYORGANIZATION_OU=ERSTE+20ADMINISTRATIVE+20GRUPPE_CN=RECIPIENTS_CN=user@domain.intern
#550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ##

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the recipient does not have an X400 address but only normal SMTP addresses


on the client side (sender) we have taken the following steps without success:
- deleted NK2 cache file
- disabled Exchange Cache mode

With OutlookWebAccess everything is fine.

also if we completely remove the User-Profile in Outlook (on the client PC) and add a new Exchange Server connection, the problem is solved.


What else can we try?   Is there another cache somewhere in the outlook profile?



I do not want to remove/add every Mailbox in every single Outlook on every single PC by hand...
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Question by:Sebastian Talmon
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Accepted Solution

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5g6tdcv4 earned 2000 total points
ID: 36602263
Updating the OAB on the Exchange server (right click and select update)
creating a new default oab?
have you tried forcing a full download of the OAB?
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Author Closing Comment

by:Sebastian Talmon
ID: 36716382
forcing a full download of the OAB showed an error in OAB distribution on the Exchange Server

Problem is fixed now, thanks!
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