DAVx⁵
Because Android doesn't know the concept of address books, DAVx⁵ has to create a so-called DAVx⁵ Address book account for every synchronized CardDAV address book.
Normally, contacts apps only display accounts which can really used to synchronize contacts. In the context of DAVx⁵, these accounts are "DAVx⁵ Address book" accounts.
In the illustration below you can see an account called "t-online" with one address book called "Mein Adressbuch". This address book is the only entry in the AOSP Contacts app, as one would expect.
Google Contacts + Android 11
If you use the Google Contacts app with Android 11, it will not only show DAVx⁵ address books, but also the DAVx⁵ main accounts, although they are not used to synchronize contacts.
Always put contacts into a "DAVx⁵ address book" account. If you put them into a "DAVx⁵ [without: address book]" account, they will not be synchronized!
See also:
- Google Contacts shows non-address book account (forum) – if you have questions, additional information or ideas how to solve this problem, please post there.
- Android issue #175337153
How to fix it
This problem would have to be fixed in Google Contacts. Possible workarounds:
- You can continue to use Google Contacts and put new contacts only into DAVx⁵ address book accounts (see illustration).
- Or you can use any other contacts app, for instance:
- your device vendor's Contacts app (including AOSP Contacts),
- one of the countless other contacts app in the app stores.