...

• http://office.microsoft.com/en-us/outlook-help/best-practices-when-using-the-outlook-calendar-HA104004449.aspx

...

Putting your calendar (or EGA's calendar) on the web via a URL

CIT's instructions, added 6/5/2017:

• https://it.cornell.edu/outlook-web/share-your-calendar-outlook-web#section-2
• https://it.cornell.edu/outlook-web/share-resource-account-calendars-outlook-web#section-2

Oliver's testing and his instructions created before the above instructions were added by CIT:

You can do this for one or more of your own account's calendar(s) in your own Outlook account. Or even an EGA! (CIT has dropped its documentation for how to do this for an EGA, so take that for what it's worth, "support-wise".)

...