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Dynamics 365 Community / Forums / Customer experience | Sales, Customer Insights,... / CTA Buttons rendering ...
Customer experience | Sales, Customer Insights,...
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CTA Buttons rendering terribly in Outlook

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Posted on by JD-09042217-0
How do I possibly fix rendering of buttons in Outlook? I've added mso code and it does nothing, RTJ just scraps it and does it own thing. How is it possible that Microsoft can’t render their own emails in their own inbox? Can someone please help me fix this. I’ve included an image of how they render:
 
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Dynamics 365 Customer Insights - Journeys
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  • LoraHug Profile Picture
    LoraHug 16 on at
    Outlook desktop just ignores most modern CSS, and if RTJ is stripping your MSO/VML, the button will break no matter what you do. In practice, the only stable approach is to keep it a very simple table-based button with inline styles, no reliance on padding/background tricks, and avoid putting it inside components that RTJ rewrites. It won’t look perfect, but it will render consistently, which is about the best you can get with Outlook.
  • Suggested answer
    ManoVerse Profile Picture
    ManoVerse 1,075 Super User 2026 Season 1 on at
    Lora is right here as this is expected behavior in Outlook on desktop. Outlook does not use a modern browser engine to render emails,  it uses the Microsoft Word rendering engine, which does not support <button> elements or modern CSS (flexbox, margins, border‑radius, etc.) which results that Outlook strips or rewrites the markup and renders buttons incorrectly, regardless of your mso styles. This is a known and long‑standing limitation, not an issue with your code. 
    Support solution is that you build buttons using : 
    1. Table‑based layout
    2. An <a> tag styled as a button
    3. Optional VML (conditional comments) if rounded corners are required in Outlook
    <button> elements will never render reliably in Outlook desktop.

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