Nextcloud Calender - deactivate invitation over nextcloud


eM Client is an incredible mail software for mac, i really like to use it.
The synchronization with nextcloud is amazing, but I have an issue with invitations.

Sent invitations and responses to invitations are sent over nextcloud, which then leads to unsupported mime-types on the receiving party. Is that an eM Client- or nextcloud behaviour?
Is it possible to change that in a way, that sent and answered invitation are sent directly by eM Client and not over nextcloud?

Thanks in advance

In most cases when the event is in a synced calendar, then the server sends the invitation, not eM Client.

You can test this and see if you get the same result when eM Client sends the invitation.
To do that, create the event in a Local Folder calendar.