In which I share another Office365 glitch.
Apparently Microsoft's $26.2 billion acquisition of LinkedIn didn't include acquiring enough SSL certificates. Cheapskates.
/owa/?realm=...&path=/calendar/view/Week:1 Mixed Content: The page at 'https://outlook.office.com/owa/?realm=...&path=/calendar/view/Week' was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint 'http://m.c.lnkd.licdn.com/mpr/mprx/0_xbbVGXdSTyyfYoKVZNwqXLID8f7SYVpVZkJBX54iDUaaMRmNVB69Q_b-4cG'. This request has been blocked; the content must be served over HTTPS.