On my fairphone 6 with /e/OS/ I try to use the standard mail cliënt delivered with the OS. I have a murena.io account and that seems to work fine.
When I try to access an outlook mail account in this app, it asks me besides the mail address and pasword for SMTP and IMAP servers and port numbers. Does anyone know what tot full in these? Or where to find that?
If you want to get GAFAM-free, then you might want to migrate your calendar from Outlook to Murena, from where it can be shared across pretty much all devices using FOSS and robust and open protocols. But I’m not sure what provision MS makes for exporting the data, and of course you may be tied to Outlook for other reasons.
On my own phone I have private calendars from Murena, but also work calendar from the proprietary app of my work’s mail system. Thanks to Android calendaring I can view at a glance all my calendars consolidated in any of the calendar apps, including the proprietary one.