Error - User does not have a server mailbox

A

Andy Westlake

Manager and user in the same domain and in the same mailbox store on the
server. Manager gives user permissions to view task list and top level
mailbox. User tries to access manager's tasks and gets error "User does not
have a server mailbox". I know there is a Knowledgebase article but that
talks about the mailboxes being in different domains.
Any ideas please?
 
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