AEM Assets Dynamic renditions preview UI and Image presets thumbnail UI show Broken Images

[KiranMa1]

Hi Community,

We’re running into an issue with Dynamic Media previews on AEM as a Cloud Service Author.

When viewing assets in the Asset Details view or when browsing Dynamic Media image presets in the side rail, the thumbnails and previews fail to load. Looking at the network calls, the preview URLs are being generated like this:

https://author-xxxxx.adobeaemcloud.com/is/image/...?$preset-lg$

These requests return 403 or 404 since /is/image/ is not available on the author domain in Cloud Service.

However, when we copy the rendition URL or use RESS, the URL points correctly to the Scene7 CDN:

https://s7d1.scene7.com/is/image/...?$preset-lg$

So the problem seems to be that the AEM Author UI is picking data-imageserver=/is/image/ instead of data-production-imageserver=https://s7d1.scene7.com/is/image/ when building the preview URLs.

Questions:

1. Is this a known limitation/bug in AEM as a Cloud Service (that the Author UI still tries to render previews via /is/image/)?

2. Should we expect Author to automatically use the production Scene7 delivery URLs for previews?

3. Is there a recommended configuration (OSGi, service mapping, etc.) to fix this, or does it require a product fix from Adobe?

Environment:

• AEM as a Cloud Service

• Dynamic Media hybrid mode enabled

• Issue occurs in Asset Details (renditions) and Image Presets console

  

cc: @kautuk_sahni 

[Saravanan_Dharmaraj]

@KiranMa1  Have you checked this documentation? especially on how to fix Image preview not loading. Please test it lower environment or local instance. I haven't tested this. 
https://experienceleague.adobe.com/en/docs/experience-manager-65/content/assets/dynamic/troubleshoot...

[Abie]

Hi @KiranMa1 ,

It seems your Dynamic Media connection is broken, which is why the image server domain is falling back to the current domain, which is author. Can you check if your Dynamic Media connection is success?

Thanks!

[vikasbharti · Accepted solution]

Please find the answers to the questions:

Is this a bug?

No, it is the expected design, but errors indicate a misconfigured DM Preview server or missing allowlist IPs.(https://experienceleague.adobe.com/en/docs/experience-manager-cloud-service/content/assets/dynamicme...)

Should Author UI use production CDN directly?

No, Author uses /is/image/ and the preview/test server by design for unpublished/secure asset preview.

How do you fix?

1. Ensure the Secure (Preview) Test server is enabled and the Author IP is allowlisted in DM Classic.

2. Ensure AEM’s DM config has the correct “Secure Preview Server” set.

3. Use Sample Manager for sync/debugging, since CRX is not accessible with AEM CS.

https://experienceleague.adobe.com/en/docs/experience-manager-cloud-service/content/assets/dynamicme...