For you ownCloud fellows, you should already heard of founding engineering crews from ownCloud left the company and created a brand new company called Nextcloud. Theoretically, Nextcloud and ownCloud should share the same or similar concept in the server backend.
Out of curiosity, I want to check if EVO Collaborator for Outlook is compatible with Nextcloud. I applied for a trial account on Nextcloud (https://demo.nextcloud.com/). The server path is https://nextcloud_server/<username>/remote.php/, which (looks pretty familiar lol?) is what you would enter hostname space if you were to have an account from a Nextcloud service provider.
However, if you run your own Nextcloud server, the server URL is the same as ownCloud and I think that looks very familiar to me: https://<nextcloud_server>/remote.php/
Therefore, we can still use EVO Collaborator for Outlook to synchronize Nextcloud’s contact, calendar and task with Outlook.
After some basic tests, I think everything works fine, if you find any problem maybe you can contact next cloud or evo staff.