If I create a reminder in Cortana on my laptop or Android phone (or in Sticky notes on my laptop), it shows up in the Windows 10 Calendar on my laptop, where 'Cortana Reminders' appears as a calendar in the list of calendars I can tick or not to show or not. But the Cortana Reminders calendar does NOT show up in the Outlook.com Calendar, or the Outlook Android App Calendar. And because of that the Cortana reminders do not sync to or appear in e.g. the default (Google) calendar on my phone or the calendars in my phone (BlueMail) or PC (Thunderbird) email clients.
I find it both puzzling and frustrating that the Cortana Reminders calendar is not integrated with the Outlook.com and Outlook app calendars and therefore isn't available to sync with other calendars either. I would rather base my combined Windows 10 laptop and Android phone (on which I use Microsoft Launcher) use on the Microsoft rather than the Google ecosystem. But when it comes to calendars and reminders, if I create a reminder in e.g. Google Keep on PC (in my web browser) or phone, or with Google Assistant, it appears in my gmail.com calendar and the phone default (Google) calendar app, and from there syncs to and appears in my linked email client calendars AND the MIcrosoft Windows 10 Calendar app and Outlook.com and on through the MIcrosoft apps. This gives a clear advantage to using the Google products as the base for reminders and calendars.
PLEASE integrate things so that the Cortana reminders calendar appears as one of the calendars in Oulook.com the way it does in the Windows 10 Calendar app, and is then available from there for syncing with other calendars like the Google Calendar app and assorted email client ones. It would not only be very useful (and put the Microsoft system on level pegging with the Google system), but I find it astonishing that this wasn't done from the get go.
Yeah I was noticing Cortana is linked with To-Do in my Microsoft launcher but I can't get notification Cortana or To-Do create in the outlook calendar and as such do not show in the MSFT launcher calendar widget either. Talk about shooting yourself in the foot.@DavidGB