How to add email address to account

[foss-]

LineageOS 19.1 w DAVx5 4.2.3.2-ose

Using Synology Calendar (CalDAV) and Synology Contacts (CardDAV) as two separate accounts in DAVx5. When creating events, the participants list show as participating: yes (green checkmark in calendar app on macOS) and name (null) (organiser).

I guess this is because DAVx5 has no knowledge of my own email thus organiser is showing as (null). Iirc I did this, because it was not possible to use the same email twice for the separate CardDAV and CalDAV accounts. Is it possible to set an email after creating the account in DAVx5 so that created events correctly shows me as organiser?

[rfc2822]

The email address must be the account name of the CalDAV account. It should work to rename the account.