I am having some trouble with a Nextcloud server. I set up a digitalocean droplet to test contact syncing for work. I went with the setup that I use at home, which is Yunohost and Nextcloud. This was/is working fine to sync contacts with iOS using the built-in support for CardDav accounts in iOS.
I made a snapshot of the server and rebuilt it on a work account (also Digital ocean). I reconfigured it for a new domain name, and got a letsencrypt cert. I can login and manage the admin and user accounts.
I set up an iPad to use the new server, and it seemed to work fine. However, I subsequently tried a couple other iPhones, and it won’t connect to the account.
It isn’t a fail2ban thing, because on the same apple devices that I can’t connect to the accounts on, I can go login to Nextcloud in their browser.
What is happening?
Is the caldev URL somehow wrong? SSL verification could be wrong URL or wrong date even
I don’t think so. As I said, this server is a copy of one on another domain that is still working. Also, this new server was able to validate at least once.