The Document Shared Mailbox Details v2 crate does not check for and remove assets for shared mailboxes that have been deleted since they were added in ITG.

The add missing forms to ITG crate correctly handles removal for forms that no longer exist, so the functionality is present and has been worked out previously.

Having a list of shared mailboxes that is not accurate is not the kind of documentation we want in my organization, and not the example I want to set for my users.