When I opened a mailbox, I got an error "Database is damaged and can't be repaired (UNID index)". I tried using some Notes tools to fix it--such as load fixup, updall, compact--but I still can't open this mailbox. Inside, I have some important documents. Could you please advice how to fix it?
If the documents are corrupt, you may not be able to get to them. Try making a new replica of the database, and that might repair the documents.