Hi ! I recently install our Exchange 2007 from scratch. And the most important problem is that the server is unable to deliver the messages to each server mailbox. I am having the next error: STOREDRV.Deliver.Exeption:MapiExceptionADNotFound Can anybody help me? Thanks!

Can you please run ExBPA to see if there are any permission issues? Can you create a mailbox database to test? If the database does not mount successfully after creation, there might be a permission issue which you can check from ADISEdit. If there is an account SID of deleted account, remove it. If inheritence is disabled on Exchange Org, enable it.