{"id":1132,"date":"2011-12-14T11:24:02","date_gmt":"2011-12-14T10:24:02","guid":{"rendered":"http:\/\/www.tsls.co.uk\/?p=1132"},"modified":"2011-12-14T11:24:02","modified_gmt":"2011-12-14T10:24:02","slug":"unable-to-mail-route-between-exchange-2003-and-exchange-online-o365-smtp-5-4-6","status":"publish","type":"post","link":"https:\/\/www.tsls.co.uk\/index.php\/2011\/12\/14\/unable-to-mail-route-between-exchange-2003-and-exchange-online-o365-smtp-5-4-6\/","title":{"rendered":"Unable to mail route between Exchange 2003 and Exchange Online (O365) SMTP 5.4.6"},"content":{"rendered":"

ISSUE<\/h2>\n

When attempting to email any mailbox which is hosted in O365 where a hybrid (co-existence) configuration has been deployed with an on-premise Exchange 2003 organisation you receive NDR email messages and event log errors are raised as follows:
\n\u00a0<\/span>
\nEVENT LOG:<\/span>
\n\u00a0
\nEvent Type:\u00a0Error
\nEvent Source:\u00a0MSExchangeTransport
\nEvent Category:\u00a0NDR
\nEvent ID:\u00a03020
\nDate:\u00a0\u00a012\/13\/2011
\nTime:\u00a0\u00a011:12:28 AM
\nUser:\u00a0\u00a0N\/A
\nComputer:\u00a0SERVER
\nDescription:
\nA non-delivery report with a status code of 5.4.6 was generated for recipient x-ex;\/O=EXCHANGE\/OU=External (FYDIBOHF25SPDLT)\/cn=Recipients\/cn=61338b4fc700481296869bdf761c0edb (Message-ID <3DA1FDF3A7EA5C4DBD3E3F0AE3553B81788AFB@server.domain.local>).\u00a0\u00a0
\nCause: A forward loop was detected by the categorizer. This is a common hosting configuration problem caused when someone uses the provisioning tool to create a contact in one organization unit and creates a user in a different organization user that share the same e-mail address.\u00a0\u00a0\u00a0
\nSolution: Verify that you do not have a user in organizational unit and a contact in a different organizational unit that have the same e-mail address.\u00a0
\nData:
\n0000: 46 05 04 80\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 F..\u0080\u00a0\u00a0\u00a0
\n<\/code>
\n\u00a0
\nEmail NDR:<\/span>
\n\u00a0
\nSubject:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Test
\nSent:\u00a0\u00a0\u00a0\u00a0 13\/12\/2011 11:39
\n\u00a0
\nThe following recipient(s) could not be reached:
\n\u00a0
\nADMIN1 on 13\/12\/2011 11:39
\nA configuration error in the e-mail system caused the message to bounce between two servers or to be forwarded between two recipients. Contact your administrator.
\n<server.domain.local #5.4.6><\/code>
\n\u00a0<\/p>\n

Resolution<\/h2>\n

\u00a0This error normally occurs because the email policy for the service domain in Exchange 2003 has been misconfigured.
\n\u00a0
\nTo resolve the issue run through the following:<\/p>\n

    \n
  1. In Exchange System Manager, navigate to Administrative Groups <\/strong>> Recipients > Recipients Policies <\/strong><\/li>\n
  2. Open the Recipient policy which contains the service domain name (normally in Default Policy)<\/strong><\/li>\n
  3. Select the E-Mail Addresses (Policy tab)<\/strong> edit<\/span> the SMTP addresses used by the service domain name (I.E service.domain.com, %g.%s@service.domain.com<\/a>)<\/strong><\/li>\n
  4. Uncheck <\/strong>This Exchange Organization is responsible for all mail delivery to this address.<\/li>\n
  5. Click OK and Close <\/strong>Exchange System Manager<\/li>\n<\/ol>\n

    Wait for AD and the Email Policy to synchronise
    \nThen confirm that emails can now be sent to O365<\/p>\n","protected":false},"excerpt":{"rendered":"

    ISSUE When attempting to email any mailbox which is hosted in O365 where a hybrid (co-existence) configuration has been deployed with an on-premise Exchange 2003 organisation you receive NDR email messages and event log errors<\/p>\n","protected":false},"author":11,"featured_media":1144,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_newsletter_tier_id":0,"footnotes":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[21],"tags":[721,761],"class_list":["post-1132","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-microsoft","tag-exchange-2003","tag-exchange-online"],"jetpack_publicize_connections":[],"yoast_head":"\r\nUnable to mail route between Exchange 2003 and Exchange Online (O365) SMTP 5.4.6 - TSLS - Luke Smith<\/title>\r\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\r\n<link rel=\"canonical\" href=\"https:\/\/www.tsls.co.uk\/index.php\/2011\/12\/14\/unable-to-mail-route-between-exchange-2003-and-exchange-online-o365-smtp-5-4-6\/\" \/>\r\n<meta property=\"og:locale\" content=\"en_GB\" \/>\r\n<meta property=\"og:type\" content=\"article\" \/>\r\n<meta property=\"og:title\" content=\"Unable to mail route between Exchange 2003 and Exchange Online (O365) SMTP 5.4.6 - TSLS - Luke Smith\" \/>\r\n<meta property=\"og:description\" content=\"ISSUE When attempting to email any mailbox which is hosted in O365 where a hybrid (co-existence) configuration has been deployed with an on-premise Exchange 2003 organisation you receive NDR email messages and event log errors\" \/>\r\n<meta property=\"og:url\" content=\"https:\/\/www.tsls.co.uk\/index.php\/2011\/12\/14\/unable-to-mail-route-between-exchange-2003-and-exchange-online-o365-smtp-5-4-6\/\" \/>\r\n<meta property=\"og:site_name\" content=\"TSLS - 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