“Trusted Sender” ends up in junk folder

Why does an email from a Microsoft certified "Trusted Sender" which has the Green Shield end up in my junk mail folder? I have read the other similar questions and the moderator's responses seem to be confusing "Trusted Sender" with "safe sender". I know how to get to the "safe sender" options under inbox/options/ preventing junk email/safe and blocked senders. If you are a moderator answering this question, please know what a microsoft "Trusted Sender" is before answering.

Thanks for your help