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biplabmukh asked on

IMCEAEX NDR message

Hello,
Few of our users are receiving below NDR;

IMCEAEX-_o=ExchangeLabs_ou=Exchange+20Administrative+20Group+20+28FYDIBOHF23SPDLT+29_cn=Recipients_cn=9056efeaf98e47a4aa7ebbb11658591c-userlastname+2C@domain.com

In above NDR, user's last name is there with the prefix numbers.

IMCEAEX-_o=ExchangeLabs_ou=Exchange+20Administrative+20Group+20+28FYDIBOHF23SPDLT+29_cn=Recipients_cn=17b3e6e8eef040bba4f480fe2f11af09-userlastname+2C+20userfirstname@domain.com
#550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ##

In above NDR, just user's last name and first name is there with the prefix numbers.

I reviewed articles on internet stating it is an issue with "legacyexchnageDN". It says to adjust the legacyexchangeDNS value in the UserAD properties by ADSIEDIT to the same value mentioned in the NDR.

But in my case this NDR contains numbers in prefix.

Recipient Policy for our domain is FLastname@domain.com (First initial followed by lastname)

Please let me know how to resolve this.

Thanks.
Exchange

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Last Comment
biplabmukh

8/22/2022 - Mon
ASKER CERTIFIED SOLUTION
Joseph Daly

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ASKER
biplabmukh

1) Same NDR issue from other machines.

2) Username and Email address WAS NOT changed for the user of 1st NDR
    Username and Email address WAS changed for the user of 2nd NDR.

3) Deleted the cache entry, sent mail by taking name from Address book, but same issue.
ASKER
biplabmukh

Can anyone please suggest?
ASKER
biplabmukh

Can anyone please suggest?
Experts Exchange has (a) saved my job multiple times, (b) saved me hours, days, and even weeks of work, and often (c) makes me look like a superhero! This place is MAGIC!
Walt Forbes
ASKER
biplabmukh

Can anyone please suggest?
ASKER
biplabmukh

solution did work.