Are nextcloud contacts really used anywhere?

[piks]

I decided to look into nextcloud on MiaB to see if it offered anything. If I understand it, from various posts (mostly old) is that opening it up beyond contacts and calendar is “on your own”.
I also read that it’s required to be up for mail contacts.

I got in and poked around…

HOWEVER, the mail accounts have contacts and they autofill in the To: field just fine, but they are NOT in nextcloud contacts.

What EXACTLY is used in nextcloud for a mail-only machine?

Is there a safe and immutable way to disable or remove nextcloud in MiaB that persists across upgrades or refreshes?

The posts out there seem out of date…

Thanks in advance.

[dallaslu]

Mail clients can use CalDAV/CardDav/ActiveSync to synchronize contacts and calendars. In Miab’s webmail, you can choose to use the built-in address book or the address book in nextcloud.

The built-in address book is generally used to tag correspondents who have correspondent emails, which helps to use filters and such. The nextcloud address book provides synchronization to the client.

[piks]

Thanks. Where/how does the synchronization happen between built-in and nextcloud and how do you chose which addressbook to use in MiaB? The contacts picked up from emails that are in MiaB aren’t showing in nextcloud.

[dallaslu]

Webmail(Roundcube: https://box.example.com/mail ) → Settings → Preferences → Contacts, options with label Default address book and Collected addresses