When you send email messages to an internal user in Microsoft Office 365, you receive an IMCEAEX non-delivery report (NDR) because of a bad LegacyExchangeDN reference. The IMCEAEX NDR indicates that the user no longer exists in the environment.
8/24/2014 · User unable to Send email, email bounce back with the below error: Error : To isolate the issue . 1: Checked if the user is in Disabled account in Directory Services …
6/13/2019 · IssueUsers receive an IMCEAEX NDR when emailing another internal user. Cause This can be caused by a bad LegacyExcangeDN. A change in the LegacyExchangeDN for that user is usually the culprit or a user and/or contact was deleted. This script makes the conversion simple.
7/13/2017 · Jono, Adding X.500 addresses after a migration is recommended by Microsoft, and they were already there when this bounce occurred. If they were using the addresses provided by the Autocomplete which contains the old Exchange Server reference, then the old reference should have been to the domain of the original company, and there were already X.500 addresses added for that issue, so it.
7/10/2014 · I’ve seen the 5.5.0 5.1.1 issue crop up in every Exchange environment I’ve worked on. The symptom is: a user tries to send a message to a recipient that has been migrated from a previous version of Exchange and they receive an NDR with the error: IMCEAEX-_O=EXCHANGEITUP_OU=EXCHANGE+20ADMINISTRATIVE+20GROUP+20+28FYDIBOHF23SPDLT+29_CN=RECIPIENTS_CN=TEST+20USER@exchangeitup.com, 2/26/2011 · IMCEAEX- _O=EXCHANGE _OU=EXCHANGE+20ADMINISTRATIVE+20GROUP+20+28FYDIBOHF23SPDLT+29_CN=RECIPIENTS_CN=Fred+2EJones@domain.com#550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ## Fred Jones (fred.jones@domain.com) is a valid address though which is strange. And, like I said, some users can email him fine. …
IMCEAEX- _O= Org Name>_OU= _CN= _CN= _CN=user@domain.com #550 5.1.1 RESOLVER.ADR.ExRecipNotFou nd; not found ## What I’m looking for is a way to make the old x.400 addresses valid again. I tried to create a transport rule and strip the ‘IMCEAEX’ Etc out of the header, and that didn’t work.
Field Description; Generating server: This field indicates the name of the SMTP mail server that created the NDR. If no remote server is listed below the sender’s email address, the generating server is also the server that rejected the original email message.
Email sent from Outlook clients to the disabled Exchange mailbox have a recipient of: IMCEAEX-_O=FIRST+20ORGANIZATION_OU=EXCHANGE+20ADMINISTRATIVE+20GROUP+20+ 28FKODFHF45SPDLT+29_CN=RECIPIENTS_CN=myusername@company.com. Email sent from Outlook clients to normal Exchange mailboxes are just ‘theusername@company.com’.
When you change an Exchange user’s name, their X.500 address changes. The X.500 address is what Outlook caches for the type-ahead lookup that everyone is using.
