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#11
What you are using is the Windows 10 Mail App. You should make this very clear when asking as it gets very confusing referring to another application.
All you can do with a right click is "Move to Junk", I assume that also marks it as Junk.
You can also sign in to the Webmail interface to Outlook Email, and there use the Junk Menu item to select "Junk" or "Phishing scam".
The Account > Cog > Options gives you further options for junk email.