Is it possible to create a custom mail storage for MS Outlook 2007?

Question

I know that Outlook stores all mail in a .PST file.

Is it possible to create a custom storage engine for outlook 2007?

I would like to have the functionality similar to 'Personal folders', but have a new node of folders where everything is stored in a SQL Server database.

Is Outlook extensible enough to allow swapping the internal storage, while leaving the UI intact (so I don't have to recreate it from scratch)?

Thanks

Answer 1

You can find this article interesting - Outlook to SQL

It is about syncing Exchange Server with SQL database. Unfortunately I am not aware how you can completely put away the "Outlook storage engine"