How to create x500 address
I recently recreated an Exchange 2007 user mailbox, and now recipients replying to old emails are getting this NDRs: IMCEAEX-_O=CompanyName_OU=Site_CN=RECIPIENTS_CN=Username@domain.com I did some research and apparently, I need to create a custom X500 address. I tried doing that using the format below, but the user is still getting NDRs. /o=CompanyName/ou=Site/cn=Recipients/cn=User@domain.com Someone said it's case-sensitive, but still getting NDR's. Can somebody tell me what I'm doing wrong? Thank you in advance. Bill
February 15th, 2011 11:23am

This blog posting should help. It is for SBS 2008, but that is the same version of Exchange. http://blogs.technet.com/sbs/archive/2009/05/21/cannot-reply-to-old-emails-or-modify-old-calendar-items-after-pst-mail-migration.aspx The ideal method would be not to delete the original mailbox. Create a new one, move all data etc and then forward the old to the new. Then it wouldn't be a problem. Do ensure that you are using up to date information - so test from OWA. If you are testing from Outlook it could be using an old version of the OAB which will be old content. You might have things correct after all. Simon.Simon Butler, Exchange MVP Blog | Exchange Resources | In the UK? Hire Me.
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February 15th, 2011 11:47am

try adding the legacyExchangeDn of old mailbox as x.500 address Something like: x500:/o=<org name>/ou=<site name>/cn=Recipients/cn=<alias> legacyExchangeDN:/o=<org name>/ou=<site name>/cn=Recipients/cn=<alias>Dhruv
February 15th, 2011 11:48am

Well I just tried both custom addresses: x500:/o=<org name>/ou=<site name>/cn=Recipients/cn=<alias> LegacyExchangeDN:/o=<org name>/ou=<site name>/cn=Recipients/cn=<alias> but I'm still getting the NDRs. I'm confirmed that there are no typos. I even tried from OWA and still getting the same NDR. Any other suggestion?
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February 15th, 2011 3:39pm

Simple test if you send an email to IMCEAEX-_O=CompanyName_OU=Site_CN=RECIPIENTS_CN=Username@domain.com does the user get it or does it bounce?James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com
February 15th, 2011 5:03pm

Just tried. Still getting NDR. #550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ##
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February 15th, 2011 5:21pm

Was this originally a 2003/5.5. org? Compare the x500 you entered to the legacyExchangeDN of another mailbox. Can you post the exact x500 address you added ( obscure the Org Name and alias if you want, but not the actual construction of the address) Remember, either the admin group, recipients container or alias changed when you recreated the mailbox. The x.500 address you add as a custom address has to be what it was BEFORE. So most likely, it was referring to a legacy admin group, or you created a new alias when you created the new mailbox (SamAccountName versus First.Last etc..)
February 15th, 2011 6:14pm

Here are the two x500 custom addresses that I entered: X500:/o=company/ou=NY/cn=RECIPIENTS/cn=user@domain.com LegacyExchangeDN:/o=company/ou=NY/cn=RECIPIENTS/cn=user@domain.com And yes, the user was originally a member on the Exchange 5.5 org, then upgraded to 2003 and now 2007. Thank you in advance.
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February 16th, 2011 11:17am

Here are the two x500 custom addresses that I entered: X500:/o=company/ou=NY/cn=RECIPIENTS/cn=user@domain.com LegacyExchangeDN:/o=company/ou=NY/cn=RECIPIENTS/cn=user@domain.com And yes, the user was originally a member on the Exchange 5.5 org, then upgraded to 2003 and now 2007. Thank you in advance. Ok, the 2nd one is not a proxyaddress, so you can remove that. Assuming the OU is set correctly ( NY was the legacy Admin Group?), and the Org Name is correct, then I would focus on the cn= Typically the 5.5 alias is going to be the original sAMAccountName and not user@domain.com Is that really what it was?
February 16th, 2011 11:22am

Are you sure cn=user@domain.com is correct? Typically the cn= john doe. The @domain.com isn't typically there unless there was some customization going on. When you looked up an existing user's legacyexchangedn did it show @domain.com?James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com
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February 16th, 2011 11:29am

Well, I think the OU is NY. Below is the NDR so that's what I'm referencing. IMCEAEX-_O=COMPANY_OU=NY_cn=Recipients_cn=User@domain.com #550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ## I will try using the sAMAccountName, but how do I get the sAMAccountName?
February 16th, 2011 11:36am

Well, I think the OU is NY. Below is the NDR so that's what I'm referencing. IMCEAEX-_O=COMPANY_OU=NY_cn=Recipients_cn=User@domain.com #550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ## I will try using the sAMAccountName, but how do I get the sAMAccountName? It would be the account they logon to the domain with using the domain\user convention. Whatever "User" is. If you look at other accounts legacyexchangeDN values, you can confirm that. That IMCEAEX-_O=COMPANY_OU=NY_cn=Recipients_cn=User@domain.com isnt really what their legacyExchangeDN value was nor is it a valid address. Its the encapsulated address of that account referring to the default recipient domain.
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February 16th, 2011 11:40am

The x500 is typically using the alias or cn unless there was some customization. Just add two x500 addresses like below, one of them will likely be the correct one. /O=ExchangeOrgName/OU=NY/cn=Recipients/cn=jdoe /O=ExchangeOrgName/OU=NY/cn=Recipients/cn=John Doe James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com
February 16th, 2011 11:41am

The x500 is typically using the alias or cn unless there was some customization. Just add two x500 addresses like below, one of them will likely be the correct one. /O=ExchangeOrgName/OU=NY/cn=Recipients/cn=jdoe /O=ExchangeOrgName/OU=NY/cn=Recipients/cn=John Doe James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com Or an Employee Number or JohnD or etc.. :)
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February 16th, 2011 11:45am

OMG!! It's working!! The full username did the trick. Woo-hoo!!! Thanks everybody!
February 16th, 2011 1:51pm

Glad you got it figured out! :)
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February 16th, 2011 2:44pm

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