problem migrating shared folders from cyrus to dovecot

Hi all,

We face a problem migrating shared mailboxes from an old cyrus server to dovecot. Whereas migrating regular users works like a charm, the shared mailboxes cannot be migrated. dsync/doveadm states: "Error: Failed to access mailbox INBOX: Mailbox does not exist". This is somehow true since the shared mailboxes live not under user.mailbox but rather under shared.mailbox (cyrus special).

Has anyone a solution for this peculiar problem?

Cheers,

j.hofmüller http://thesix.mur.at/