Hello Pierre-Henri Lavigne
Thanks for raising your concerns in Microsoft Community.
You are correct that emoticons and emojis are not considered "product icons" and are typically treated differently in terms of licensing and use. However, it's important to note that the specific licensing terms for these assets can vary depending on the platform they are used on and the context in which they are being used. For more details of Microsoft Copyrights, you can see this article:
Copyrights | Microsoft Legal
In general, emoticons and emojis that were included with older versions of Windows Messenger or Windows 8/10 are likely protected by copyright law and should not be used without permission from the copyright holder*(However, this is subject to the local country's copyright law on copyright protection)* The fact that they are no longer actively supported or widely used does not necessarily mean that they are now free to use without permission.
As you noted, Microsoft provides some guidelines around the use of its copyrighted materials, including product icons and other creative content.
In terms of emojis and icons provided through Microsoft 365, the licensing terms are likely to be more permissive since they are intended for use within the Microsoft ecosystem.
As we learned in earlier community threads, these emoticons and icons are allowed to be recreated or added to your products and applications [for example, as "retro icons" for chat]. As long as the user uses them for personal, non-commercial use only, and does not sell the content separately for a second time, there is no need to worried about copyright infringement.
Feel free to post back if anything unclear.
Best regards,
Chandy |Microsoft Community Support Specialist