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    <title>topic Re: ACS - Error code 502 after Transactional mailing move... in Adobe Campaign Standard Questions</title>
    <link>https://experienceleaguecommunities.adobe.com/t5/adobe-campaign-standard/acs-error-code-502-after-transactional-mailing-move-to-prod/m-p/415161#M3176</link>
    <description>After 1 week of waiting, 2 reminders and 1 escalation, support finally replied and fixed the issue, which was indeed related to the CNAME !</description>
    <pubDate>Tue, 06 Jul 2021 15:20:31 GMT</pubDate>
    <dc:creator>xavierv6303633</dc:creator>
    <dc:date>2021-07-06T15:20:31Z</dc:date>
    <item>
      <title>ACS - Error code 502 after Transactional mailing move to prod</title>
      <link>https://experienceleaguecommunities.adobe.com/t5/adobe-campaign-standard/acs-error-code-502-after-transactional-mailing-move-to-prod/m-p/414434#M3173</link>
      <description>&lt;P&gt;Hello,&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;I have the exact same issue as described in those two tickets : &lt;A href="https://experienceleaguecommunities.adobe.com/t5/adobe-campaign-standard/acs-url-problem-for-event-call/qaq-p/250646" target="_self"&gt;here&lt;/A&gt; and &lt;A href="https://experienceleaguecommunities.adobe.com/t5/adobe-campaign-standard/response-502-while-using-production-instance/qaq-p/364628" target="_self"&gt;here&lt;/A&gt;.&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;We implemented transactional messaging on our Staging ACS instance, where everything works fine. After moving to production, we get the following error message when calling the transaction message API. (The token exchange works fine) :&amp;nbsp;&lt;/P&gt;&lt;P&gt;{&lt;/P&gt;&lt;P&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp; "code": 502,&lt;/P&gt;&lt;P&gt;&amp;nbsp;&amp;nbsp;&amp;nbsp; "message": "Oops. Something went wrong. Check your URI and try again."&lt;/P&gt;&lt;P&gt;}&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;After seeing the response in the two tickets I referred, I created a second projet in I/O, specifically for Production, but I still get the same error. &lt;A href="https://experienceleague.adobe.com/docs/campaign-standard/using/working-with-apis/about-campaign-standard-apis/setting-up-api-access.html?lang=en" target="_self"&gt;This doc&lt;/A&gt; seems to indicate it might be a CNAME issue, to check with support. Can this really be the issue? Does someone have an idea of what else might cause this?&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;The URI itself seems correct to me :&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P data-unlink="true"&gt;- Staging :&amp;nbsp;&lt;SPAN&gt;https://mc.adobe.io/TENANT-mkt-stage1&amp;nbsp;&lt;/SPAN&gt;&lt;SPAN&gt;/campaign/mcTENANT/EVTRecuVenteConnu&lt;/SPAN&gt;&lt;/P&gt;&lt;P data-unlink="true"&gt;- Prod :&amp;nbsp;&lt;SPAN&gt;https://mc.adobe.io/TENANT&amp;nbsp;&lt;/SPAN&gt;&lt;SPAN&gt;/campaign/mcTENANT/EVTRecuVenteConnu&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;Any help is appreciated!&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;&lt;U&gt;&lt;STRONG&gt;SOLUTION EDIT&lt;/STRONG&gt;&lt;/U&gt; : A separate Adobe I/O project is indeed mandatory for staging and production. The 502 issue in production was indeed related the a misconfiguration with the CNAME, which support could fix for us.&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;Kr,&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&lt;SPAN&gt;Xavier&lt;/SPAN&gt;&lt;/P&gt;&lt;P&gt;&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Fri, 08 Oct 2021 17:47:26 GMT</pubDate>
      <guid>https://experienceleaguecommunities.adobe.com/t5/adobe-campaign-standard/acs-error-code-502-after-transactional-mailing-move-to-prod/m-p/414434#M3173</guid>
      <dc:creator>xavierv6303633</dc:creator>
      <dc:date>2021-10-08T17:47:26Z</dc:date>
    </item>
    <item>
      <title>Re: ACS - Error code 502 after Transactional mailing move...</title>
      <link>https://experienceleaguecommunities.adobe.com/t5/adobe-campaign-standard/acs-error-code-502-after-transactional-mailing-move-to-prod/m-p/414435#M3174</link>
      <description>&lt;P&gt;you are on the right track, this is CNAME issue. Adobe support can fix this for you.&lt;/P&gt;</description>
      <pubDate>Tue, 29 Jun 2021 16:29:07 GMT</pubDate>
      <guid>https://experienceleaguecommunities.adobe.com/t5/adobe-campaign-standard/acs-error-code-502-after-transactional-mailing-move-to-prod/m-p/414435#M3174</guid>
      <dc:creator>mmbb110</dc:creator>
      <dc:date>2021-06-29T16:29:07Z</dc:date>
    </item>
    <item>
      <title>Re: ACS - Error code 502 after Transactional mailing move...</title>
      <link>https://experienceleaguecommunities.adobe.com/t5/adobe-campaign-standard/acs-error-code-502-after-transactional-mailing-move-to-prod/m-p/414437#M3175</link>
      <description>Ok great, I hope this is indeed the issue, which means an easy fix! I will update this thread whenever I get an answer from support, for future reference. Thanks for your reply!</description>
      <pubDate>Tue, 29 Jun 2021 16:57:39 GMT</pubDate>
      <guid>https://experienceleaguecommunities.adobe.com/t5/adobe-campaign-standard/acs-error-code-502-after-transactional-mailing-move-to-prod/m-p/414437#M3175</guid>
      <dc:creator>xavierv6303633</dc:creator>
      <dc:date>2021-06-29T16:57:39Z</dc:date>
    </item>
    <item>
      <title>Re: ACS - Error code 502 after Transactional mailing move...</title>
      <link>https://experienceleaguecommunities.adobe.com/t5/adobe-campaign-standard/acs-error-code-502-after-transactional-mailing-move-to-prod/m-p/415161#M3176</link>
      <description>After 1 week of waiting, 2 reminders and 1 escalation, support finally replied and fixed the issue, which was indeed related to the CNAME !</description>
      <pubDate>Tue, 06 Jul 2021 15:20:31 GMT</pubDate>
      <guid>https://experienceleaguecommunities.adobe.com/t5/adobe-campaign-standard/acs-error-code-502-after-transactional-mailing-move-to-prod/m-p/415161#M3176</guid>
      <dc:creator>xavierv6303633</dc:creator>
      <dc:date>2021-07-06T15:20:31Z</dc:date>
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