We started using IDM with Sharepoint as a content repository.
Are there others using this product?
We found out that there's no indexing column created in a the Sharepoint lists.
This makes the product unusable for lists with more then 5000 items (every query starts failing, since Sharepoints prevents tablelocks in SQL)
Since we are the first to hit this (very low) limit, I suspect that the Sharepoint backend isn't used by many customers.
Which backend are you using?