The long trusted conditional HTML statements for Outlook do not seem to be honored by the latest version of Outlook (2025). They still work in older versions.

Example code: <!--[if gte mso 9]> This information will display only in Microsoft Outlook 2000 and newer> <![endif]-->

Even if simplifying to just "mso" this doesn't work... I've spent a few hours looking for help, possibly new code or targeting but haven't come across anything on this topic.

Hoping there's someone out there who's run into this and might have some ideas.

Wrapped HTML blocks in the MSO conditional code (as I have done many, MANY times, but Outlook 2025 does not render the blocks... older versions do, however.