Try clearing the autocomplete cache:
Is this happening for one use or all?
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We have exchange 2013. we are getting NDR from internal users from outlook. OWA is working fine, we are facing issue only for outlook.
And we have checked offline address book. offline address book is working properly. and we have also check after creating new outlook profile but we are facing same issue.
Try clearing the autocomplete cache:
Is this happening for one use or all?
Hi,
Is there any Diagnostic information for administrators under the NDR message? If there's information like below, you should add the correct X500 address to the sender's email address(ADUC-Users-username-attribute editor-proxyaddresses):
Generating server: EXCHANGE-SERVER.somename.domain.com
IMCEAEX-_O=FIRST+20ORGANIZATION_OU=EXCHANGE+20ADMINISTRATIVE+20GROUP+20+28FYDIBOHF23SPDLT+29_CN=RECIPIENTS_CN=******@domain.com
#550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ##
- Replace any underscore character (_) with a slash character (/).
Another solution you can try is asking the problematic user to reply to a message from those users who he can't send to, see if the problem solved after that.
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