Diagnostic information for administrators:<o:p></o:p>
Generating
server: <o:p></o:p>
/o=corporation/ou=Exchange
Administrative Group
(FYDIBOHF23SPDLT)/cn=Recipients/cn=76dbb84d1f8748caa84b73cc13e0e943-aabb
Remote Server returned ''<o:p></o:p>
/o=corporation/ou=Exchange
Administrative Group
(FYDIBOHF23SPDLT)/cn=Recipients/cn=4aa0338a0b7f46f9bd305613c3156b3d-ccdd
Remote Server returned ''<o:p></o:p>
/o=corporation/ou=Exchange
Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=cf9231f30d6743989c83162fad675411-eeff
Remote Server returned ''<o:p></o:p>
This error came internally when sending an email to three internal addresses. - We don't have any issues sending email to these users, and this is actually their legacyexchangedn. This is a resource domain - so these are linked mailboxes.
Any idea ? no errors on the exchange servers, or IIS logs.
Exchange 2013 cu3