DAV clients such as Thunderbird and DAVx5 cannot access calendars or addressbooks if access to the app is allowed for logged-in users only, because these clients cannot obtain an SSO session. To use DAV clients with Baikal, access for visitors needs to be allowed (see Can't connect Thunderbird to Baikal). Note that even then clients need to authenticate with username and password of an YNH user. Also note that the admin interface of Baikal is always available only to logged-in YNH admin users. The fact that DAV clients need anonymous access is not documented yet. I would like to add this to the documentation at Baikal | Yunohost Documentation (PR pending) and to the setup dialog (PR pending), in a similar manner as for Gitea: https://github.com/YunoHost-Apps/gitea_ynh/blob/master/manifest.json#L53
Nothing related to Baikal, I’d just like to express my gratitude for you taking the effort not only to improve the app, but also to make an account on the forums especially for that.
Today I finally got around to install Baikal on my YNH server again and everything works perfectly Thanks so much for keeping the app updated! Using this (german) guide I was also able to share a calendar between users.