IMAP is used for email-only. We do not use the proprietary IceWarp extensions for Groupware access since we use native CalDAV/CardDAV protocols to access these items. For accounts configured using the automatic discovery mechanism all the necessary settings are configured automatically.
While we do not have mechanism to subscribe to shared folders it is still possible to accomplish it by creating folder named “~email@example.com” (where “firstname.lastname@example.org” is email of the other user) under the account root folder.
Because we have groupware accounts on the server just for calendar events.
But with the IMAP account I get for each groupware account (where I’m a member of) a grayed or not grayed list entry in EMail section… with no function.
I don’t need it at the Mail section on the client.