Undelivered email error due to mailbox re-creation/restore old mailbox in Exchange 2013/2016
When you re-create a mailbox or restore any old mailbox in Exchange 2013/2016 you may face undelivered error message when you send email to that email address/mailbox.
Remote Server returned ‘550 5.1.11 RESOLVER.ADR.ExRecipNotFound; Recipient not found by Exchange Legacy encapsulated email address lookup’ error.
Problem:
Delivery has failed to these recipients or groups:
Mohammad K Hasan
The email address you entered couldn’t be found. Please check the recipient’s email address and try to resend the message. If the problem continues, please contact your email admin.
Diagnostic information for administrators:
Generating server: MSExchange01.contoso.com
IMCEAEX-_o=contoso_ou=Exchange+20Administrative+20Group+20+28FYDIBOHF23SPDLT+29_cn=Recipients_cn=12aa1c830cd74907af595558f8891567-Mohammad+20K@contoso.com
Remote Server returned ‘550 5.1.11 RESOLVER.ADR.ExRecipNotFound; Recipient not found by Exchange Legacy encapsulated email address lookup’
Reason:
Re-create mailbox/restore old mailbox.
If you re-create mailbox then the X500 certificate address of old mailbox has been changed. That’s why you must add X500 address to the ECP 2013/2016.
Solution:
Step-1: Go to error message and find the IMCEAEX address which is start with IMCEAEX and end with @yourdomain.com.
Example: IMCEAEX-_o=contoso_ou=Exchange+20Administrative+20Group+20+28FYDIBOHF23SPDLT+29_cn=Recipients_cn=12aa1c830cd74907af595558f8891567-Mohammad+20K@contoso.com
Step-2: Convert the above IMCEAEX address to X500 address
IMCEAEX address: IMCEAEX-_o=contoso_ou=Exchange+20Administrative+20Group+20+28FYDIBOHF23SPDLT+29_cn=Recipients_cn=12aa1c830cd74907af595558f8891567-Mohammad+20K@contoso.com
Convert to
X500 Address: /o=contoso/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=12aa1c830cd74907af595558f8891567-Mohammad K
Where, +20= Space
+28=(
+29=)
_ = /
Step 3: Add the X500 address to the Exchange ECP as bellow.
You can see the you tube video here.
That’s It.
Please subscribe to my youtube channel and get more exclusive videos