Nextcloud server only accessible from LAN with the usual self signed certificate. Coming back from vacation, server has crashed. New installation, restore server from backup. But the certificate has changed – ok, it is a new one.
Trouble is that the iPhones won’t accept the new certificate on an existing account! You have to delete the existing account on the iPhone and create a new one, accept the certificate and only then the iPhone syncs with the Nextcloud (which runs on a raspberry pi).
But the user made some entries into his NC calendar during his vacation, which will be lost if I delete the account! Ok, since time was of essence, I deleted the account on the iPhone and the entries got lost. But I really would like to prevent that happening for a second time.
Can I make a backup of the self signed certificates and restore them after a crash in a new installation? What is needed to this end? – Thank you!