There was an error while replying or sending e-mails to migrated user getting the following NDR:
Diagnostic information for administrators:Generating server: HUB.lab.local IMCEAX-_O=LAB_cn=LABOU_cn=Recipients_cn=recipient #550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ##Original message headers: Received: from MAIL.lab.local ([169.254.1.104]) by ....
- Cause
LegacyExchangeDN is used to route mails within organization and after migration old LegacyExchangeDN was missing.
- Solution
Add X500 address to e-mail addresses of migrated mailbox pointing to OLD legacyExchangeDN from NDR user have received.
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EAC add X500
- The format of X500 address is well described here:
http://msexchangeguru.com/2012/03/15/x500/
- From our example
/O=LAB/ou=LABOU/cn=Recipients/cn=recipient@domain.local
UPDATE: The last part of X500 should be user alias so unless @domain.local is part of your alias, it should be without @domain.local. I just have had and example, where this mattered.
/O=LAB/ou=LABOU/cn=Recipients/cn=recipient_alias
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