Share among several nextcloud server

Nextcloud version: 26+
Operating system and version: several shared hoster

The issue you are facing:
4 user from four different nexcloud server wish to share Data.

  • How should federated sharing set up?
  • What tools should be used? Circles, Groups (what’s the difference
  • What right should we request from the Nextcloud Admins.
  • Should we defin a kind of Server for the shares or is this not needed?

Goal is to share calendar and a collectives page read and writable.
One Nextcloud user share both ressources among other users on the same nextcloud. If we need to setup a kind of main holder of the data it would be him.

Is this the first time you’ve seen this error?: Y