Level 10

ACC MSO Conditional Images Not Uploaded (Long-standing Bug)

Forum|Forum|26 days ago
April 20, 2026
3 replies
92 views

ACC has a long-standing bug where images inside MSO conditionals are not detected during content upload. The parser appears to treat the conditional comment wrapper as a standard HTML comment, causing any <img> tags within to be skipped entirely during asset discovery.

Affected pattern:

html

<!--[if mso | ie]>
  <img src="https://images.emlcdn.net/cdn/..." width="640" ...>
<![endif]-->

This becomes particularly painful when a template uses MSO image fallbacks for animated media (GIFs/video posters) potentially dozens of images that all require manual intervention each deployment cycle.

Current workaround (unacceptable at scale): Strip the conditional comment wrappers → upload → re-wrap. Completely counterproductive for templates with multiple fallback images.

ccg1706

Community Advisor

@Jacinda E, I think this could be interesting to share it with the product team! It is happening across several Campaign customers.

U

user70715

Level 1

How do we go about sharing with the Product Team? We’ve love to get this sorted!

ccg1706

Community Advisor

Hi @user70715 are community moderators the ones that share it with them. Thanks!

david--garciaAuthor

Level 10

@Jagpreet_Singh_ @Sukrity_Wadhwa

Any chance of forwarding this to product owners :) I’ve faced this with every client I’ve worked with for the past 5 years :)

https://www.linkedin.com/in/david-garcia-uk/ | https://martech.network