Mail no working in Mail-Client after Migration NS 7 -> 8

[mrmarkuz (Markus Neuberger)]

@Axel_Pospischil

if I recreate the domain: will the mailboxes be deleted as well? Or is the new user(s) with the same name remapped to the existing mailbox?

No mail data is deleted. New users with same name are remapped to existing mailboxes.

@Axel_Pospischil

Other services like nextcloud and SoGO also use the LDAP users. Will the usage of a new LDAP be possible, if the usernames / passwords do not change and match in the new LDAP?

I need to check about Nextcloud as the users are mapped to UUIDs…
SOGo just uses the user domain of the mailserver app.

EDIT:

As regards Nextcloud the files would need to be migrated to the new UUID of the user.

Enter Nextcloud container:

runagent -m nextcloud1 podman exec -ti nextcloud-app sh

Example of listing files of a user:

ls -l data/73fc5571-0027-4c97-b744-eb3df525900c/files/

The UUIDs are shown in the Nextcloud account settings (when logged in as admin):

So you need to get the old UUIDs before removing the LDAP user domain and then copy the files to the new UUID directory.

Finally the files need to be scanned:

runagent -m nextcloud1 occ files:scan --all

I found that there’s an app for importing/exporting users but I never tested: User migration - Apps - App Store - Nextcloud

@Axel_Pospischil

I do not have a problem doing this with CLI, but this might be not that easy, I assume.

Yes, it’s not trivial, see Nextcloud can't create share - #23 by mrmarkuz