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Exchange 2007 to 2010 550 5.1.1 RESOLVER.ADR.RecipNotFound; not found

Posted on 2011-02-23
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Last Modified: 2012-06-27
ok, we have 2 exchange servers running in the same forest, one a 2007 and one a newly installed 2010, they are both authoritive for different domains.  The domain that is going to be on the 2010 exchange already has a 3rd party email system in place for the time being until we can get everything migrated over.  Right now when a user on the 2007 exchange box emails a user that will be on the 2010 but currently on the 3rd party, My question is 2 fold, If i remove all the users that are on the 3rd party from exchange, and remove the accepted domain that is currently being used by the 3rd party, will the 2007 exchange server just send out through inet like normal?  or if i just remove the accepted domain and leave the users until i'm ready?  Or is something like shared smtp namespace with an internal routing domain the way to go?  
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Question by:jasonmichel
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Expert Comment

by:Amit
ID: 34963198
Can you post the current env diagram here
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Author Comment

by:jasonmichel
ID: 34963924
here is the general gist
right now i need to get mail going again, so if i remove the accepted domain for the domain 3, it should send to the 3rd party now correct?
netlayout.vsd
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Expert Comment

by:Amit
ID: 34964069
Thanks for the providing the design. Now why you want to remove mailbox or remove connector.

Just move them over to Exchange 2010 in Domain B. Here I am assuming 3rd Party server is also Exchange.
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Author Comment

by:jasonmichel
ID: 34964100
because domain 1 and 2 are totally different than domain 3 and have no relevance to each other, but they are showing up in the 2010 exchange server as well because they are in the same forest.  Domain 3 is currently being handled by the 3rd party email system, which is icewarp not exchange. we are migrating from icewarp to exchange, but right now domain 1 and 2 can't email domain 3 because its trying to send to mailboxes in exchange that haven't been set up yet, so i was going to remove the accepted domain for domain 3 so the 2007 exchange wouldn't send to it and instead send out to dns to go to 3rd party email system
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Expert Comment

by:Amit
ID: 34964142
Ya, that should work. Directly sending to internet.
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Author Comment

by:jasonmichel
ID: 34972556
ok, i removed the accepted domain for domain 3 on the ex2010 server but the users for domain 1 and 2 still can't send to it. Could the 2k7 exchange box still have the domain 3 as an accepted domain?  would removing the users for domain 3 until cut work?
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Accepted Solution

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Amit earned 2000 total points
ID: 34972607
Design shows you are directly connected with Domain 3. You might need to create new connector, that should route emails to outside world. Check with your DNS team
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Author Comment

by:jasonmichel
ID: 34972674
the 2007 box already has a connector sending to inet..should it be a specific connector for domain 3, as this is the only domain that they can't send to..like i said, it worked fine before exchange 2010 was installed
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Expert Comment

by:Amit
ID: 34973580
Are you able to send email to Gmail or some other account
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Author Comment

by:jasonmichel
ID: 34973847
not sure if i explained this before or not, the 2007 exchange server has been in place for 3 years, works fine, and worked fine sending to domain 3 when they were on the icewarp server, which they are currently on, once exchange 2010 was installed, they were unable to send to domain 3 via icewarp, if i put the accepted domain in the 2010 server for domain 3 , then the 2k7 server sends to the 2010 mailboxes, we don't want that yet, we want them to send to the icewarp server until everyone is migrated over
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Expert Comment

by:Amit
ID: 34973876
I am not familiar with ICEWARP server...I suggest you to click request attention button and see if you someone with ICEWARP knowledge can help
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Author Comment

by:jasonmichel
ID: 34973972
this isn't an icewarp issue, the icewarp server is working fine, the issue is with exchange and the way the 2007 server delivers mail to the domain 3 users
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Expert Comment

by:Amit
ID: 34974057
OK Jason,

Can you do one favour. If you have any NDR report post here...will see from which server it is failing.
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Author Comment

by:jasonmichel
ID: 34998276
giving you points for the time you tried to fix, didn't fix the issue, my solution of removing the accepted domain for the time being did, but i appreciate the help
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