Convert NDR to LegacyExchangeDN / x500 Custom Address

To create an X500 proxy address for the old LegacyExchangeDN attribute for the user, make the following changes based on the recipient address in an NDR:

IMCEAEX-_O=EXCH_OU=EXCHANGE+20ADMINISTRATIVE+20GROUP+20+28FHSDHJF23GHYED+29_CN=RECIPIENTS_CN=RON+[email protected]

Convert _ to /

/O=EXCH/OU=EXCHANGE+20ADMINISTRATIVE+20GROUP+20+28FHSDHJF23GHYED+29/CN=RECIPIENTS/CN=RON+[email protected]

Next

/O=EXCH/OU=EXCHANGE+20ADMINISTRATIVE+20GROUP+20+28FHSDHJF23GHYED+29/CN=RECIPIENTS/CN=RON+2E[email protected]

•Replace any underscore character (_) with a slash character (/)

•Replace "+20" with a blank space

•Replace "+28" with an opening parenthesis character

•Replace "+29" with a closing parenthesis character

•Replace "+2E" with a period

•Delete "IMCEAEX-"

•Delete "@domain.com"

•Add "X500:" at the beginning.

X500:/O=EXCH/OU=EXCHANGE ADMINISTRATIVE GROUP (FHSDHJF23GHYED)/CN=RECIPIENTS/CN=RON.Mayers

 

IMCEAEX non-delivery report when you send email messages to an internal user in Office 365: http://support.microsoft.com/kb/2807779

1.       Clear the auto-complete cache file

2.       Create an X500 proxy address for the old LegacyExchangeDN attribute for the user

Mystery of adding X500’s – What an amazing thing to know…!!! « MSExchangeGuru.com: http://msexchangeguru.com/2012/03/15/x500/

Fixing IMCEAEX NDRs - Missing X500 Addresses: http://www.righthandedexchange.com/2013/02/fixing-imceaex-ndrs-missing-x500.html