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Hi Brian,
Thank you for getting back to me, can you please check your news letter, spam and promotional emails as well to see if there is any email that could have triggered it and check the message source for that open the email, go to File, select Properties and click on Internet headers. Check the browser add‑on that integrates with Outlook, rogue extension injecting web beacons and potentially unwanted program so if Malware blocked this programs you can uninstall this by pressing Win + R then type in appwiz.cpl sort by Install date and uninstall unknown recent items.
Other than this please check as well the browser extension (Chrome, Firefox or Edge) remove coupon apps, “shopping savers,” crypto add‑ons, URL shorteners then reboot and retest.
Best regards,
Marcelo