On Tuesday evening, 7/9/19 between 6:00 PM and 8:00 PM, the Autodiscover settings used by O365 email clients connected to HUIT managed domains will be adjusted. No outage time is expected.
Following this change, Outlook users may receive a popup window asking them to allow https://huitexchange.university.harvard.edu/autodiscover/autodiscover.xml
to configure their settings. It is safe to check "Don't ask me about this website again" and then click "Allow".