I feel you, but to me it was worth the effort and now I have a setup that works.
I run a calendar server[0] that is my main calendar repository. And I use vdirsyncer[1] to sync to my laptop to use khal[3]. On the Android side I sync with davx5[4].
This allows me to subscribe to webcal calendars, which outlook365 offers, and syncs them to my two main devices.
Not perfect because that means I can't edit my outlook calendar from within this system ( and a reminder why open standards and interoperability are important ), but it means that my private calendars and addressbooks are self hosted.
You are right though, that takes effort. And I want to snark at microsoft for not supporting caldav, but then I am waiting for gnome-calendar to support it as well. It doesn't seme to and that feels a bit strange to me.
However, according to this issue calendars work once added but the only GUI-way to add them right now still seems to be Evolution, after which they will show up in gnome-calendar as well (also some workarounds here):
This is my setup, but additiinal I use davmail to get exchange support. Only problem is that right now importing events into outlook automatically sends mails to all participants.
Had some FUBAR situations where vdirsyncer tried to fix "something" (which is necessary from time to time since davmail does only rudimentary checks of events) and got im a situation where I send confirmations for 5 year old events to a few dozend people
I run a calendar server[0] that is my main calendar repository. And I use vdirsyncer[1] to sync to my laptop to use khal[3]. On the Android side I sync with davx5[4].
This allows me to subscribe to webcal calendars, which outlook365 offers, and syncs them to my two main devices.
Not perfect because that means I can't edit my outlook calendar from within this system ( and a reminder why open standards and interoperability are important ), but it means that my private calendars and addressbooks are self hosted.
You are right though, that takes effort. And I want to snark at microsoft for not supporting caldav, but then I am waiting for gnome-calendar to support it as well. It doesn't seme to and that feels a bit strange to me.
[0] https://radicale.org/ [1] https://github.com/pimutils/vdirsyncer [2] https://github.com/pimutils/khal [3] https://github.com/pimutils/khal [4] https://www.davx5.com/