Issue: - IMCEAEX – Recipient Is not found

Error Message: -

IMCEAEX-_O=EXCH_OU=EXCHANGE+20ADMINISTRATIVE+20GROUP+20+28FHSDHJF23GHYED+29_CN=RECIPIENTS_CN=Gengaiyan+2EMani@domain.com

Issue Statement: -

When you send email to any internal users these will be routed based on user LegacyDN Exchange attributes and auto-complete cache in Microsoft Outlook and in Microsoft Outlook Web App (OWA) uses, these values to route email messages internally. If the value changes, the delivery of email messages may fail with a 5.1.1 NDR – Recipient is not found.

If someone changed any below object properties in Exchange or AD user LegacyExchangeDN will change,

• First Name
• Last Name
• Email Address
• Alias

Resolution: -

To resolve the email delivery issue, we need to convert the below IMCEAEX delivery address to X500 Address and add it on user Exchange properties under X500 Type.

Before you convert the values, we need to understand few things to make correct X500 address,

IMCEAEX-_O=EXCH_OU=EXCHANGE+20ADMINISTRATIVE+20GROUP+20+28FHSDHJF23GHYED+29_CN=RECIPIENTS_CN=Gengaiyan+2EMani@domain.com

Convert _ to /

/O=EXCH/OU=EXCHANGE+20ADMINISTRATIVE+20GROUP+20+28FHSDHJF23GHYED+29/CN=RECIPIENTS/CN=Gengaiyan+2EMani@domain.com

Next

/O=EXCH/OU=EXCHANGE+20ADMINISTRATIVE+20GROUP+20+28FHSDHJF23GHYED+29/CN=RECIPIENTS/CN=RON+2EMani@domain.com

•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=Gengaiyan.Mani

Thanks for Visiting. Keep watch for the further updates!