Currently it’s not possible to edit accounts.
Duplicate of #219, please follow up there.
@j-ed Thanks for the update!
Next News. When I’m on android 7.1 and I use the URL http:// instead of https:// then it works. But https:// with, for example caldav carddav from Marten Gajda, works perfect.
@rfc2822 Sorry for not checking the latest. It works well on the latest version