Does anyone know why my Outlook tray icon would have a small circle divided into blue and yellow quadrants on it?

Hi,

What version of Outlook are you using? Would you please upload a screenshot of the Outlook tray icon to help us understand the issue more clearly? if your account is not verified to upload images here, you can share the screenshot to us via sending it to GBSD TN Office Information Collection ibsofc@microsoft.com. Please include the thread URL in the subject of the email for easy follow-up.

Thanks

Steve Fan
TechNet Community Support