This list doesn’t include all @Microsoft properties, just second-level domains that load on HTTPS, plus microsoftonline.com
and windows.net
, which load on HTTPS with some subdomains only.
I collected them by combining Outlook.com assets1 and second-level domains from Office-configuration files23
These are in alphabetical order except the first entry, whence @1Password supplies its rich icon.4
microsoft.com
azure.com
bing.com
cloud.microsoft
dynamics.com
hotmail.com
iis.net
live.com
microsoftonline.com
microsoftonline.us
microsoftstream.com
msn.com
office.com
office.de
office365.com
office365.us
officeppe.com
onedrive.com
onenote.com
outlook.com
powerbi.com
sharepoint.com
skype.com
static.microsoft
virtualearth.net
windows.net
app://com.microsoft.Word